Simple Chemistry

Calculations Chemistry

100

What is the coefficient in this equation:

2CH₄

2

200

True or False

You can change subscripts in an equation to balance it. 

False

300

Grams on the periodic table is the mass of protons and neutrons as well as the ______________.

Molar mass

g/mol

400

What is the molar mass of Carbon?

15.999g/mol OR 16g/mol

500

Balance the following equation:

N₂+H_2---->NH₃

N₂+3H_2---->2NH₃

Parts of an Atom

100

The inner part of an atom that contains the proton and the neutron is called the __________.

Nucleus

200

These particles have a positive charge and are found inside the nucleus.

proton

300

These particles are located within the nucleus, and have no charge.

Neutron

400

These particles are negatively charge and are found outside the nucleus.

electrons

500

Most of the mass of an atom is located here.

nucleus

Atomic Masses

100

If an atom was enlarged so the electrons were spinning around the stands of a football stadium, how big would the nucleus be?

marble

200

Atomic masses are measured in what?

AMU

300

A proton has the atomic mass of what?

1

400

A neutron has the atomic mass of what?

1

500

An electron has a mass of what?

1/1836

Fuels

100

What is a fuel?

A fuel is any material that can be made to react with other substances so that it releases energy as thermal energy or to be used for work.

200

Combustion reactions always produce:

H₂O and CO₂

300

What fuel source produces the most energy?

H₂ Hydrogen

400

What elements make up gasoline?

Carbon and Hydrogen

500

What fuel sources includes carbon, hydrogen, and oxygen?

Ethanol 

Atomic Numbers

100

Atomic numbers of an atom are the same as the number of what in an atom?

protons

200

Carbon's atomic number is _______.

6

300

What element has a number of 56?

barium

400

Why does hydrogen have an atomic number of 1?

because it only has one proton

500

Some atoms have more ___________, which makes it an isotope and gives it a negative charge

electrons