Unit 2 atomic structure(test)

Front

What is the atomic number of an element with 9 protons?

Back

9

Front

What must be true for an atom to be neutral?

Back

The atom has the same number of protons and electrons.

Front

What does the letter 'C' represent in the periodic table?

Back

Chemical symbol.

Front

Which two subatomic particles are found in the nucleus of an atom?

Back

Protons and Neutrons.

Front

How do you calculate the atomic mass of an element with isotopes?

Back

Weighted average of the isotopes based on their abundance.

Front

What is the charge of a proton?

Back

+1

Front

What is the charge of a neutron?

Back

0 (neutral)

Front

What is the charge of an electron?

Back

-1

Front

What is the relationship between protons and electrons in a neutral atom?

Back

They are equal in number.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.