Basic Chemistry Flashcard

Front

How many valence electrons are in chlorine?

Back

7

Front

Which of the following elements is a noble gas? (Na, Mg, Cl, Ar)

Back

Ar

Front

How many protons does bromine have?

Back

35

Front

What is a valence electron?

Back

Electrons in the outermost shell

Front

What does the nucleus of an atom contain?

Back

Protons and neutrons

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of atoms bonded together.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number.

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the significance of the octet rule?

Back

Atoms tend to bond in a way that gives them eight valence electrons.