calcium has one more valence electron than sodium.
calcium has 2 valence electrons, sodium has 1.
Answer:
Na has one fewer valence electron than Ca. I did it
Explanation:
can someone go answer my qeastion please this is what it looks like
Answer:
C
Explanation: i hope this helps plz tell me if its wrong so i can fix it :)
An example of species?
Answer:
homosapiens is the species we all belong to or which humans belong to.
Explanation:
Can i have brainliest plzzzz
A sample of ancient bone is analyzed using carbon-14 dating. If the bone contains 50% as much C-14 as a modern bone, what is its approximate age?
A. 50 years old
B. 5,000 years old
C. 50,000 years old
D. 100,000 years old
Answer:
The correct option is;
B. 5,000 years old
Explanation:
The percentage amount of carbon-14 in the sample = 50%
The half life of carbon 14 = 5700
The half-life of a substance is the time it takes for a given sample of the substance to decay such that only half of the original quantity of the substance remains
The half-life of carbon 14 is around 5.730 years, which means it takes 5,730 years for a given quantity of carbon 14 to decompose and have 50% of the original quantity remaining
Therefore, given that only 50% of carbon 14 is remaining in the bone, the duration for the decomposition is approximately the half life of carbon 14, and the best option is that the age of the bone is approximately 5,000 years.
Suppose you have a mixture of sand, marbles, sawdust, and blocks of wood. You can separate these four things with a window screen, a bucket, and water. This will take three steps. The screen is used in the first step. The bucket and water is used in the second and third steps. Describe the three steps. Tell which properties of the materials made it possible to separate the mixture.
Answer:
Solubility and Particle size
Explanation:
The screen should be able to separate the blocks of wood and marbles from the sand and saw dust, assuming the marble are larger than the screen openings. This is possible through difference in particle sizes.The bucket can allow for removal of the marbles from the sand and sawdust if its smaller than the screen. Marbles are general larger than sand and would settle at the top.The water in the bucket would dissolve the saw dust instantly, leaving the sand. Sand is not soluble in water unlike he finer sawdust particles.I hope this was clear.
Please help me answer this.
Atomic numbers for atoms ______________ in increments of _________ as you move across the periodic table of elements.
What are the main components of a basic system? (NOT TALKING ABOUT COMPUTER SYSTEM)
Answer:
Every System has an IPO: Input, Process, Output. When you look at any system, in its simplest form, it has 3 components. It's what I'll call IPO: Input, Process, Output. Input – anything you do to activate the system or give the system to use.
Explanation:
Part A
Decrease the volume of the chamber by dragging the left side inward. What values changed when you decreased the
volume of the container?
Decreasing the volume of the chamber by dragging the left side inward will increase the pressure of the container.
What is pressure?Pressure is the amount of force applied perpendicular to the surface of an object per unit area. The symbol for it is "p" or P.
If the volume of a container is decreased, the gas molecules have less space in which to move around. As a result, they will strike the walls of the container more often, and the pressure increases.
Learn more about the pressure here:
https://brainly.com/question/22613963
#SPJ2
Juan's mother drives 7.25 miles southwest to her favorite shopping mall. A. Average velocity is the total displacement divided by the total time taken. What is the average velocity of Juan's mother's automobile if it arrives at the mall in 20.0 minutes? B. Does the average velocity reflect the how fast Juan's mother was driving at every point in her journey? Explain your answer by comparing the terms average velocity and instantaneous velocity.
Answer:
See explanation
Explanation:
Average velocity = distance traveled/time
distance traveled = 7.25 miles
Time taken = 20 minutes or 0.33 hours
Average velocity = 7.25 miles/0.33 hours = 21.97 miles per hour
This average velocity does not reflect how fast Juan's mother drove at every point in the journey.
At every point in the journey, Juan's mother had an instantaneous velocity given by the velocity at that given instant divided by time taken up to that point.
The instantaneous velocity gives the velocity at particular instants throughout the journey while the average velocity reflects the average velocity of the entire journey.
What is the reaction ship between cells and tissues
Answer:
A. Tissues are made up of cells
Explanation:
I just googled it :3
What does a high specific heat tell about a substance?
A. It is hard to change the temperature of the substance.
B. The substance is probably a metal.
C. The substance has very strong molecular bonds.
D. The substance has high melting and boiling points.
Answer:
A. It is hard to change the temperature of the substance
Explanation:
took test
Earths system analysis graphic organizer
Answer:
attached
Explanation:
Please help! ______ is not reactive with only 2 electrons in its valence shell.
Neon
Krypton
Xenon
Helium
Answer:
Helium
Explanation:
idrk because it has a more carbinic bond
Which of these statements is supported by evidence in both articles? A The Triangle Fire was a tragedy that could have been prevented. B The absence of fire drills caused confusion among the trapped workers. C The Triangle Fire had a lasting impact on safety regulations. D Onlookers who witnessed the fire were horrified by what they saw.
Answer: A The Triangle Fire was a tragedy that could have been prevented.
Explanation:
The Triangle Fire was a tragedy that happened in the factory of Shirtwaist Company in New York City where there was.a.fore outbreak and about 145 employees of the company were killed.
The deaths could have been prevented because the company neglected safety measures such as having a good and reliable pump system, having readily available fire extinguishers. Also, what resulted in the lethal nature of the incident was because the doors within the building of the factory were locked.
The tragedy generated lots of attention and series of laws were been out in place in order to ensure that workers are safe at their workplace.
is 8 hcl and 2 h2 products, consumers or reactants
Answer:
8 hcl and h2 is reactants.
pleaseeee helpp its a HW question
will mark brainliest!!
What do you think will happen to the speed of the molecules if a gas is heated?
How many atoms are in a sample of 0.585 moles of krypton (Kr)?
Answer:There are 1.51 × 1024 atoms
Explanation:
I dont undersand what its asking and what i should do
Magnesium has three isotopes: Magnesium-24, Magnesium-25 and Magnesium-26. The numbers 24, 25 and 26 refer to the ________________.
Answer:
I'm pretty sure the answer is Atomic Mass.
Hope I could help!
Role play anyone????
Answer:
no thanks
Explanation:
Answer:
I'd be down.
Explanation:
Which type is a metamorphic rock formed from shale?
Answer:
Slate
Slate is a foliated metamorphic rock that is formed through the metamorphism of shale. It is a low-grade metamorphic rock that splits into thin pieces.Explanation:
- HELP FAST -
Which of the following arguments is supported by the demographics of families in the work force?
O The money spent on goods has increased, because family sizes are larger than they were one hundred years ago.
O The price for housing is still unstable, regardless of the number of people living in a household.
O The money spent on clothes is increasing and is becoming a serious problem for families.
O The price of farm equipment is decreasing, causing food to become less expensive over the past one hundred years.
Answer:
the answer is D the price for housing is still unstable, regardless of the number of people living in a household.
Explanation
Edge said it was the correct answer.
The argument that is supported by the demographics of families in the workforce is the price of farm equipment is decreasing, causing food to become less expensive over the past one hundred years. The correct option is D.
What is demography?Demography is the study of the statistic of the human population. It calculates the population of humans in a specific place. It includes the population base age, gender, and other factors.
The factors of demography are population size, density, age structure, fecundity (birth rates), mortality (death rates), and sex ratio.
Farm equipment is the equipment used in farming. If food becomes less expensive than energy, the body can buy food. Then the equipment used would decrease the price.
Thus, the correct option is D. The price of farm equipment is decreasing, causing food to become less expensive over the past one hundred years.
To learn more about demography, refer to the link:
https://brainly.com/question/20944072
#SPJ2
What is the difference between burning and an explosion?
a. Burning is a combustion reaction but an explosion is an accident.
b. The rate (speed) at which the reaction happens.
C. An explosion is a combustion reaction, but burning is just a chemical
reaction
Whats some evidence that the universe is expanding
Answer:
Hubble's Law
Explanation:
search it!!
Answer:
More Stars are being made expaning the universe new galaxys are being made by stars,dust and dark matter.
properties of proton
Answer:
Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms.
Hope this helps☺️
What is the net charge of an ion that has 11 protons, 10 electrons, and 12 neutrons?
A
1+
В.
2+
C.
1-
D
2-
The net charge of an ion that has 11 protons, 10 electrons, and 12 neutrons is +1. Thus option A is correct.
What is net charge?Net charge is defined as when the number of electrons in an atom does not equal the number of protons, the atom is said to be unstable.
If the number of electrons are less than the number of protons, then they will have positive net charge.
If the number of electrons are more than the number of protons, then they will form negative net charge.
Electrons are defined as negatively charged subatomic particle which together with protons and neutrons forms atom.
Thus, the net charge of an ion that has 11 protons, 10 electrons, and 12 neutrons is +1. Thus option A is correct.
To learn more about net charge, refer to the link below:
https://brainly.com/question/8233653
#SPJ5
A swimmer travels 1500 m in 20 min. What is the averages
you choose the answer with the correct Units)
Answer:
75 m in 1 min
Explanation:
how do you figure out which metals have a density greater than another metal?
ex:
chromium has a density of 7.2g/cm3. which two of the given metals in the table have a density greater than that of chromium?
table:
•aluminum: 10(volume): 27(mass)
•copper: 2.0(volume): 18(mass)
•iron: 2.0(volume): 16(mass)
•titanium: 10(volume): 45(mass)
•vanadium: 2.0(volume): 12(mass)
Answer:
Density = Mass/Volume
Explanation:
For the example the answers are Copper and Iron
In the case of chromium having a density of 7.2, anything greater than 7.2 is a higher density. 18/2=9 and 16/2=8. The copper and iron metals were the only ones that had a higher output than the density of chromium.
A solid is that form of matter that possesses the following characteristics??