Please help!! I'll name you brainliest!!

Answer:   I think it’s D?

Explanation:

Answer:

D.

Explanation:

Weathering, erosion and deposition are processes that can wear a mountain down.

these are the correct answers

Answer:

They are listed below

Explanation:

The 5 things that the periodic table includes are;

1. Name of the element

2. The symbol of the element

3. Atomic number of the element

4. Relative atomic mass

5. Electron configuration

Answer:

Answered below

Explanation:

1) Atomic number is usually the number of protons

Since the atom is a neutral atom, Number of protons is equal to the number of electrons.

Thus means that we have 9 electrons and our atomic number is 9.

Atomic mass number is given as 20.

The is topic notation makes use of the atomic number and mass number.

Atomic number of 9 denotes fluorine.

Thus, the isotopic notation is written as attached;

2) we are told that an atom has 13 protons and 12 neutrons.

Similar to A above,

Atomic number is 13.

Now, number of neutrons + number of protons = mass number.

Thus;

Mass number = 13 + 12 = 25

Element with atomic number of 12 is magnesium

Thus,isotopic notation is as attached.

Answer:

V= 21 cubic cm (( I am not sure about density ))

Explanation:

V= L×W×H

Answer:

15% adenine

Explanation:

Thymine and adenine are a nitrogenous base pair so they would equal the same.

Answer:

False

there is three

Explanation:

Three laws are combined together which is further known to us as Newton ’s three laws of motion. These three newton’s laws of motion are: Law I – Newton’s first law of motion Law II – Newton’s second law of motion

Hope this helps :)

Answer: Cr2NiO7 is the molecular formula for nickel II dichromate.

Answer:

Because different isotopes have different numbers of neutrons, they do not all weigh the same or have the same mass. Different isotopes of the same element have the same atomic number. They have the same number of protons. The atomic number is decided by the number of protons.

Hope this helps!!!!

Explanation:

Answer:

CH4

Explanation:

Answer:

Multicellular

they are single celled

Answer:

lost is the answer to this question but if I am wrong I am so sorry for that

Answer:

the answer would be to your problem here is 90g

Explanation:

Answer:

Well I would say " I think my responsibility is recycling, gardening, picking up litter, and using less pollution. All of this stuff is very important. Sometimes, it's the tiny things that change the world for the better."  

I hope this helped! Feel free to add your own little tweaks.

Answer:

Difficult Question but I would say no

Explanation:

I say no because the whole premise of a chemical reaction is the reaction to new bonds and bond losses happening due to the introduction of a new substance. If the substance hasn't changed at all, it wouldn't be a chemical reaction because their would be nothing reacting.

Answer:

It would be nothing. Quite literally nothing. No Oxygen, no dirt, no anything.

Explanation:

Answer:

Nothing

Explanation:

Everything we have in our world is made up of elements. Without them, we would have nothing.

Answer:

ok so you would just weigh 125 because 16 oz is 1 pound

Explanation:

Answer: Gamma particles

Answer:

Gamma rays, are the fastest.

Explanation:

They literally move at the speed of light, I hope this helps you.

Answer:

c. F

Explanation:

As you go top to bottom down a column of the periodic table, atomic radius increases.

As you go left to right across a period of the periodic table, atomic radius decreases.

Knowing this trend, that means that the smallest atomic radius would be located in the top right of the periodic table. The closest element to that point is fluorine, or answer C.

Answer:

117 millimeters = 0.117 meters

Explanation:

This is using unit conversions. There are 1000 millimeters in 1 meter, so you would divide your starting value, 117 millimeters by 1000 millimeters. The units will cancel because they are being divided by themselves and you are left with 0.117 meters.

Answer:

Explanation:

Using Charles Law ,

[tex]\frac{V1}{T1}=\frac{V2}{T2}[/tex]

Using this formula we have ,

V1= 200cm^3

T1=40+273.15 = 313.15 K

T2 = 100+273.15 = 373.15 k

V2= ?

Hence using above formula simplify it we will get ,

V2 = 238.3 cm^3

Answer:

i dont know that plzzz help me tooooo

Answer:

Explanation:

The responding variable always is measured against the variable that you have control over.

In this case, you have control over the volume of air.

The responding variable is the amount the plant has grown.  This would be a good long term experiment to try for a science fair or just because you might be interested. It's a good simple idea.

Answer: Chemical Change.

Explanation: Lemon juice has properties that, when heated, turn the paper brown. In the invisible ink science experiment, that is why it is used. In lemon juice, the acid prevents peeled fruit from browning, like apples and pears. The lemon juice has a bitter taste and is acidic.

Specific gravity is the "heaviness" of a mineral. It is defined as a number that expresses the ratio between the weight of a mineral and the weight of an equal volume of water.

Answer:

The ratio of it's mass of an equal volume of water.

Explanation:

Answer:

Magnesium Difluoride

Explanation:

Mg = magnesium

F = fluoride

F2 = difluoride (prefix "di" indicates 2)

Answer:

1. Force

2. contact force

3. non-contact force

4. magnetism

5. strength and direction

6. length, direction

7. newtons

Explanation:

You're welcome <3

Answer:

A.

Explanation: