Atomic Structure

Front

What is the mass number of an atom with 10 protons and 15 neutrons?

Back

25

Front

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

Back

9

Front

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

Back

Chemical symbol

Front

What makes up most of the mass in an atom?

Back

Protons and neutrons

Front

What must be true for an atom to be neutral?

Back

The atom has the same number of protons and electrons.

Front

Define atomic number.

Back

The number of protons in the nucleus of an atom.

Front

Define atomic mass.

Back

The weighted average mass of an atom's isotopes.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What is an electron?

Back

A negatively charged particle that orbits the nucleus of an atom.