Answer:
D. Chemical Reaction
Explanation:
Meaning: A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a reaction.
which of the following elements has the greatest atomic radius?
A. potassium (K)
B. arsenic (As)
C. bromine (Br)
D. calcium (Ca)
Answer:
A. Potassium (K)
Explanation:
The trend of atomic radius goes:
As group number increases, radius decreases
As period number increases, radius increases
Answer:
francium
Explanation:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
which element has a negative oxidation number?
N
CI
AL
Xe
Answer:
Im pretty sure its Cl but that might be wrong
Explanation:
I looked on the web for this one
A shark can swim for long periods of time with an average speed of 2.2 m/s. How far would a shark swim at this speed in 42.4 minutes?
Answer:
5596.8 m
Explanation:
42.4 minutes is equal to 2544 seconds.
2544s * 2.2m/s= 5596.8
9 A certain type of bacteriophage replicates by incorporating its own genetic material into the host genome
where it is passed on to future generations over time. This type of viral reproduction is known as
A) binary fission
B) budding
C) the lysogenic cycle
D) the lytic cycle
Answer: b
Explanation: cheese
The iron cube and water in this system are at the same temperature.
a. Which particles have higher average kinetic energy?
A The water particles
The iron particles
They both have the same
Answer:
They both have the same temperature.
Explanation:
When two or more substances of different temperature are mixed, heat is transfered from hot to clod substances till they attain thermal equilibrium i.e have the same temperature
which of the following are the three states of matter. A animals, plants and stars B earth, wind and fire C solid liquid and fire D liquid, gas and solid
Answer:
D
Explanation:
Solid , Liquid and Gas
Answer:
D. liquid, gas, and solid
Hope I helped!
Explanation:
Give the brainliest
Classify the following metals by increasing order of melting temperature
a) Na Li K
Classify the following metals by increasing order of melting temperature
b) Al Mg Na
Explanation:
a. K Na Li
melting point decreases a
down the group since more shells are added down the group hence the the attractive force that the protons exert on the electrons decreases down the group and hence melting point also decreases down the group.
i.e Li,Na,K decreasing order.
And hence the increasing order will be:
K Na Li.
b. Na Mg Al
Effective nuclear charge increases across the period and hence melting point increases across the period since Al Mg and Na are in the same period hence the increasing order will be Na Mg Al.
Answer:
a. K,Na,Li
b. Na,Mg,Al
Explanation:
the first one Lithium because it has small atomic size hence their is greater attraction for the electrons in the energy level ,hence the heat required to break the bond is a lot hence high melting point
the second one Aluminium has a higher mpt than Mg and Na this is because as u go along the period the nuclear charge increases hence exerts higher attraction towards the electrons in the energy levels hence the bond formed is strong hence will require more heat to break.
What important piece of information should a sketch include in addition to the numeric dimensions?
Answer:
Bill of materials
Explanation:
is a substance doesn't always have the same chemical composition is it still considered a mineral
Answer:yes
(: did this help?
Which of the following is a Hemipteran?
Tarantula Hawk
Silverfish
June Bug
Cicada
Answer:
I think it's D, cicada.
According to Oxford, a Hemipteran is "an insect of the order Hemiptera, such as an aphid, cicada, or leafhopper."
Hope this helps! I also hope it's not wrong, but I do not think it is.
Also please let me know if this is correct.
What element has 3 times the atomic number as beryllium?
Answer:
Magnesium (Mg)
Explanation:
Beryllium has an atomic number of 4
4 times 3 is 12
Magnesium has an atomic number of 12
Hai people. Can you answer this for me?
Rain occurs when water vapor _____.
thxs!
Rain occurs when water vapor _condensates____.
sorry if I'm wrong
Answer:
turns into clouds it cools and condenses
plsss help me with this question
Answer:
population growth increases.
Each proton and each neutron contribute ________ amu to an atom. Amu means __________ ___________________________.
Answer:
Each proton and each neutron contribute _atomic mass_amu to an atom. Amu means _ unified atomic mass unit_
Each proton and each neutron contribute atomic mass amu to an atom. Amu means unified atomic mass unit.
What are protons, electrons, and neutrons?Protons, electrons, and neutrons are the charged particles that are present in the atoms. They together made up the atom. The atoms contain a nucleus in between and around the nucleus, electrons are present.
Atoms also contain different shells of different energy levels. In these orbitals or shells, electrons, protons, and neutrons are present. These particles are of different energy levels.
The atomic mass is made up of a total of protons and neutrons. The atomic number is the number of protons.
Thus, each proton and each neutron contribute atomic mass amu to an atom. Amu means unified atomic mass unit.
To learn more about atomic mass, refer to the link:
https://brainly.com/question/17067547
#SPJ2
What is the basis for analyzing an energy transfer diagram?
Answer these questions only has to be 2-3 sentences
1. How can erosion affect the shape of sediment
2. How does erosion sort sediment?
3. What does the phrase “poorly sorted” mean when it comes to sediment?
4. Where on the earth can you find poorly sediment
Answer:As rock fragments bump against each other during erosion, the shapes of the fragments can change. Erosion also affects the level of sorting—separating of items into groups according to one or more properties—of sediment. Sediment is often well-sorted when it has been moved a lot by wind or waves.
Answer:
1. It can cause sediment to wear down and break into peices
2.I dont exactly know
3.I dont really know
4. canons?
what are 4 household items that emit electromagnetic waves?
Answer:
oven,toaster,fridge,and lights
Explanation:
A man is moving boxes out of a house. He uses 15 N of force to lift the box 3 m from the ground into the truck. How much work did he do?
Answer:
The answer is 45 JExplanation:
The work done by an object can be found by using the formula
workdone = force × distanceFrom the question we have
workdone = 15 × 3
We have the final answer as
45 JHope this helps you
Trees that have thick, waxy needles to prevent water loss and protect from cold would most likely be found in which biome
Answer:
A taiga
Explanation:
Breanne needed to find the percent composition of the compound KClOz The percent of potassium in the compound yes approximately A) 29% 32% 39% 43% Hydrogen peronde is a harmful by product of normal metabolic activity. In order to prevent damage, b, drogen peroxide mus: be
The percent of potassium in the compound KClO₃ = 32%
Further explanationProust states the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements
[tex]\tt \%mass=\dfrac{Ar~element\times number~of~element~in~compound}{MW~compound}\times 100\%[/tex]
We determine the molecular mass of KClO₃ then we determine the Ar from K (potassium) and the amount in the compound
MW KClO₃ : 122,55 g/mol
The amount of K in KClO₃ = 1
So %K :
[tex]\tt =\dfrac{39}{122,55}\times 100\%=31.8\%\approx 32\%[/tex]
Which method of separating a mixture involves passing a heterogeneous mixture through several layers of different
materials?
O filtration
O decantation
O evaporation
O distillation
Answer: Its filtration
Explanation:
I took the test and got it right
Answer:
A
Explanation:
it is filtration
How many atoms in 3 moles of helium?
Answer:
NA = 6.02214076×10^23 mol−1.
Explanation:
1 mole of helium gas contains 6.02 x10^23 helium atoms. So multiply this by 3 after solving the equation.
There are 1.8066 x 10 ^24 atoms in 3 moles of helium
1 mole of any substance is equal to 6.022 × 1023 atoms , This is called the Avogadro's Number and it represents 12 grams of pure carbon.
Hence,
I mole of Helium = 6.022 × 1023 atoms
Therefore,
3 moles of helium will be 3 x 6.022 × 1023 atoms
3 moles of helium =1.8066 x 10 ^24 atoms
See more here:https://brainly.com/question/16497924
Which phrases describe sedimentary rock
sedimentary rocks are rocks that are combined from other rocks pressed into one.
Calculate the number of carbon atoms in a 140.0g sample of glucose (C6H12O6) . Be sure your answer has a unit symbol if necessary, and round it to significant digits.
Answer:
There are 2.81 * 10^24 atoms present
Explanation:
To get this, we need to know the number of moles present in 140gramms of carbon.
Mathematically;
number of moles = mass/molar mass
molar mass of glucose is = 180 g/mol
So the number of moles will be ;
140/180 = 0.7778 mole
1 mole of glucose contains 6 moles of carbon;
so 0.7778 moles will contain = 4.667 moles
Mathematically, the number of atoms in 1 mole is 6.02 * 10^23 atoms
The number of atoms in 4.667 moles will be :
4.667 * 6.02 * 10^23 = 2.81 * 10^24 atoms
Which of the following best describes an ionic compound? *
a positively charged compound composed of cations and atoms
a negatively charged compound composed of anions and atoms
a neutral compound composed of protons and electrons
a neutral compound composed of cations
The compound is neutral overall, but consists of positively charged ions called cations and negatively charged ions called anions.
(I hope this helped ^^)
Ionic compounds can be defined as a neutral compound composed of protons and electrons. Thus option C is correct.
An ionic compound has been formed by the transfer of electrons between atoms. The transfer of electrons will impose a charge on the atoms involved in the bond, and result in an ionic compound.
The interaction of the positively charged cations and negatively charged anions takes place. The protons are the positive charged species and electrons are the negatively charged species.
Thus, the ionic compound has been a neutral compound formed by protons and electrons. Thus option C is correct.
For more information about ionic compounds, trefer to the link:
https://brainly.com/question/9167977
What is mass of 3.5 moles of LiOH?
Answer:
84
Mass = moles x molecular mass of LiOH
= 3.5 x 24
= 84 g/mol
what makes an atom change from one element to another
Answer:
In other words, atoms of one element can be changed into atoms of another element by transmutation. This occurs either through nuclear reactions in which an outside particle reacts with a nucleus, which can be supplied by a particle accelerator, or through radioactive decay, where no outside particle is needed.
Sarah backstrokes at a speed of 8 meters per second, how long will it take her to complete the race of 200 meters length?
Answer:
I think it would take her 25 Seconds
Explanation:
To calculate how long it would take for Sarah, I did 200 divided by 8. When I did that, I got 25 as my answer. I'm not exactly sure if it would be in seconds or minutes, but I feel that seconds is more reasonable. I hope this helps, and I hope it's not wrong, but I do not think it is.
A science experiment calls for mixing 3 and two-thirds cups of distilled water with 1 and three-fourths cups of vinegar and Two-thirds cups of liquid detergent. How much liquid in all, in cups, is needed?
Answer:
the answer is 6 1/12
Explanation:
you're welcome
ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ
How are male and female frogs attracted to each other to mate?
Answer:
Explanation:
For many species of frogs, a male's mating call is the most well-recognized method of attracting females. ... Other species of females prefer males who call next to a pre-made nest. Females are on the lookout for males who go the extra mile when calling, since they presume these males are good quality mates.