Atomic Structure Flashcard

Front

What is the lightest element on the periodic table?

Back

Hydrogen (H)

Front

What is the atomic number of an atom that has 15 protons?

Back

15

Front

What does the atomic mass of an atom represent?

Back

The total number of protons and neutrons in the atom.

Front

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

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

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

Back

Protons and neutrons.

Front

What is the charge of a proton?

Back

Positive (+1)

Front

What is the charge of a neutron?

Back

Neutral (0)

Front

What is the charge of an electron?

Back

Negative (-1)

Front

How do you calculate the mass number of an atom?

Back

By adding the number of protons and neutrons.

Front

What is a chemical symbol?

Back

A one or two-letter notation used to represent an element.