Atomic Structure

Front

Most of the mass in an atom is made up of _____________________?

Back

Protons and neutrons.

Front

The atomic number of an element represents...

Back

The number of protons in the nucleus.

Front

The element on the second period in group 16 has...

Back

2 energy levels and 6 valence electrons.

Front

How many valence electrons does an atom of calcium have?

Back

2.

Front

Which of the following elements would you expect to be most similar to phosphorus in terms of its chemical properties?

Back

Nitrogen.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons.

Front

What is a valence electron?

Back

Electrons in the outermost energy level of an atom that determine its chemical properties.