WHOEVER HELPS WILL GET BRANLIEST!! ONLY 5 QUESTIONS PLEASE HELP ME!!
1. Which element has 2 electrons in the 4s energy level
2. The ion with a 2- charge in the 3rd energy level
3. This nonmetal is likely to form an ion with a 3- charge that has the highest IN in the group
4. A metalloid in period 4 with 2 electrons in the p sub level
5. The smallest of the -2 ions

Answer:

We can separate iron from a mixture of sand and iron, as only the iron is attracted to the magnet.

Explanation:

Answer:

hhdbnahdhs

Explanation:

hajsbbdjsod

Answer:

Hydrogen

Explanation:

im not 100% sure , but let me know

Answer:

D) Hydrogen

Explanation:

Hydrogen is a way of storing or transporting energy. You need to make it or extract it before you can use it.

Answer:

Atoms

Explanation:

Answer: The answer is atoms! Have a great day!

Answer:

amps is how hard it is for the volts to get through hope this helped

Explanation:

Answer:

C?

Explanation:

Answer:

Hydrogen?

Explanation:

I'm probably wrong but I hope it helps

Answer:hydrogen

Explanation:

A=20

B=40

C=Ca

D=10

E=9

F=F

The Atomic Number (Z) indicates the number of protons in an atom of an element. If the atom is neutral then the number of protons will be equal to the number of electrons. So the atomic number can also indicate the number of electrons.

So atomic number = number of protons = number of electrons

Mass Number (A) is the sum of protons and neutrons

Mass Number (A) = Number of protons + Number of Neutrons

So that the relationship between atomic numbers and mass numbers can be formulated as follows:

Atomic Number (Z) = Mass Number (A) - Number of Neutrons

A=atomic number=number of protons=20

B=mass number=protons+neutrons=20+20=40

C=the element with atomic number 20 and mass number 40 is Ca,

[tex]\tt _{20}^{40}Ca[/tex]

D=number of neutrons=mass number-number of protons =19-9=10

E=atomic number=number of protons=9

F=the element with atomic number 9 and mass number 19 is F

[tex]\tt _9^{19}F[/tex]

Answer:

Slate

Explanation:

Answer:

D. Slate

Explanation:

Had the quiz, got it right

Answer:Direction? tell me if im wrong!

Explanation:

Answer:

Im not sure but I think is D.The solution becomes cloudy with a white solid.

Explanation:

Answer:

the answer is D the solution becomes cloudy with a white solid

Explanation:

Question:

What organelle is A and B pointing?

Answer:

A = Nucleus

B = Cell Membrane

Explanation:

As we can see A points at the centre of the plant cell. Which is a nucleus. And B points to the outer part of the plant cell. Which is a cell membrane.

Hopefully this answer will help you.

Answer:

B

Explanation:

i just take the test

An ionic bond has a high melting point because a lot of energy is required to overcome the attractive forces that hold the ionic crystal together. The correct option is B.

In an ionic bond, atoms transfer electrons to form positively charged cations and negatively charged anions. These oppositely charged ions are attracted to each other, creating strong electrostatic forces between them.

When a solid ionic compound is heated, the thermal energy increases, causing the ions to vibrate more vigorously. As the temperature continues to rise, the ions gain enough energy to break free from their fixed positions within the crystal lattice. This requires a lot of energy because the attractive forces between the ions are strong and must be overcome.

Thus, the correct option is B.

Learn more about ionic bond,here:

https://brainly.com/question/9075398

#SPJ6

The ona that makes more sense is the first one

Answer:

its fluid and rubber

Explanation:

fluid and subber made a solid.

Answer:

velocity

Explanation:

Acceleration is the rate of change of velocity with time.

Acceleration= velocity/time

Answer:

Independent variable: SIZE OF NAILS

Dependent variable: NUMBER OF PAPER CLIPS

Explanation:

The independent variable in an experiment is the variable that is changed or manipulated by the experimenter in order to effect a measurable response. In this investigation, the DIFFERENT SIZES OF NAILS USED is the INDEPENDENT VARIABLE.

The dependent variable is the variable that is measured in the experiment. It is the variable that responds to changes made to the independent variable. In this investigation, THE NUMBER OF PAPER CLIPS the electromagnet could pick up is the DEPENDENT VARIABLE.

The dependent variable is the number of paper clips that the electromagnet could pick up while the independent variable is sizes of nail used.

An experiment consists of;

The independent variable is the variable that is being manipulated while the dependent variable changes with changes in the independent variable.

In this experiment, the dependent variable is the number of paper clips that the electromagnet could pick up while the independent variable is sizes of nail used.

Learn more: https://brainly.com/question/20906233

Answer:

See attached picture!

Explanation:

You are dealing with salts.  This means that you write the name of the metal (sodium) with the name of the nonmetal (chloride).  You need to change the end of the name of the nonmetal (chlorine to chloride; bromine to bromide).

To find the balanced compound, use the charges of the cations and anions.  You need to write the compounds so that the total charge of the salt is 0.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{3.75 \times {10}^{21} }{6.02 \times {10}^{23} } \\ = 0.00622923...[/tex]

We have the final answer as

Hope this helps you

Answer:

6.02 * 10^23

Explanation:

Answer:When you bring a negatively charged object close to a neutral pith ball, it creates a positive charge (i.e. opposite of negative) on the portion of pith ball nearer the negatively charged object and negative charge on the farthest portion of pith ball.

Explanation:

Answer:

Explanation:

When you bring a negatively charged object close to a neutral pith ball, it creates a positive charge (i.e. opposite of negative) on the portion of pith ball nearer the negatively charged object and negative charge on the farthest portion of pith ball.

Answer:

Explanation:

Answer:

(see below)

Explanation:

Using process of elimination:

A) lose energy

When a liquid freezes into a solid, the particles move a lot slower because the once-flowing particles are now about to be stuck in place, barely vibrating in its structure.

So, yes, they has lost energy, but there can be a better answer.

B) gain energy

When a liquid freezes into a solid, the particles move a lot slower, so there is no way there is more energy now. If there was to be more energy, it would be a gas now.

So, no, they did not gain energy.

C) move faster

When a liquid freezes into a solid, the particles move a lot slower, so there is no way they're moving faster now. Otherwise it would be a gas now.

So, no, they did not move faster.

D) disappear

Particles of a substance don't just . . . disappear. There is no way matter can be destroyed or created, only changed in form, according to the Conservation of Matter.

So, no, they did not disappear.

So the answer is most likely A.

A. λ = 3 m

B. E = 1.9878 x 10⁻³³ J

C. Total energy :  1.9878 x 10⁻²⁰ J

The photoelectric effect is an electron coming out of a metal because of electromagnetic radiation

One type of electromagnetic radiation is light

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

f = c / λ

c = speed of light

= 3.10⁸

λ = wavelength

A. wavelength

[tex]\tt \lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3.10^8}{1.10^8~Hz}=3~m[/tex]

B. energy of one photon

[tex]\tt E=h\times f\\\\E=6.626\times 10^{-34}\times 3=1.9878\times 10^{-33}~J[/tex]

C. Total energy

[tex]\tt 1.9878\times 10^{-33}\times 10^{18}=1.9878\times 10^{-20}[/tex]

Answer:

How to balance the oxygen atoms.

Add a coefficient of 5 to the oxygen molecule on the left side of the equation. You now have 10 oxygen atoms on each side.

C3H8 + 5O2 --> 4H2O + 3CO2.

The carbon, hydrogen, and oxygen atoms are balanced. Your equation is complete.

Answer:

youre not showing a drawing. look at the table. electronegativity trend is “down” and “right”. you should get your answer by looking at that trend. the more electronegative, the more reactive.

Answer: helium is a lighter (less dense) gas allowing the balloon to rise high

I hope this helped!

Answer:

helium is less dence then air

Hoped this helps! have a great day lovee