8.5ABC Review

Front

A pure substance found in nature that cannot be broken down is called __.

Back

Element

Front

How many valence electrons are in an atom of each element in Group 15 in the periodic table?

Back

5

Front

The atoms of a certain element each contain 18 protons and 8 valence electrons. What is the element's name?

Back

Argon

Front

How many electrons are in the outer shell of Chlorine (Cl)?

Back

7

Front

Which students' responses are correct?

Back

Student 2

Front

What is the definition of an element?

Back

A substance that cannot be broken down into simpler substances by chemical means.

Front

What are valence electrons?

Back

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

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is a compound?

Back

A substance formed when two or more elements chemically bond together.