Bohr Models

Front

What does the nucleus contain?

Back

The nucleus contains protons and neutrons.

Front

What are valence electrons?

Back

Valence electrons are electrons in the outer shell of an atom.

Front

What is the formula for calculating mass number?

Back

Mass number = Protons + Neutrons.

Front

How many valence electrons does an element with 4 valence electrons have?

Back

4 valence electrons.

Front

In which row of the periodic table is hydrogen found?

Back

Hydrogen is found in row 1 of the periodic table.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

What is an energy shell?

Back

An energy shell is a region around the nucleus where electrons are likely to be found.

Front

How many energy shells does a sodium atom have?

Back

A sodium atom has 3 energy shells.

Front

What is the maximum number of electrons in the first energy shell?

Back

The maximum number of electrons in the first energy shell is 2.