Ch. 4 Review pt.1

Front

What happens when an atom forms an ion?

Back

An atom either gains or loses electrons to look like a noble gas.

Front

What are the ions in the compound potassium oxide?

Back

K⁺¹ and O⁻².

Front

What color does strontium chloride burn in a flame test?

Back

Red.

Front

What can be said about an atom of beryllium and an atom of boron that have the same mass?

Back

They both have different numbers of protons and neutrons.

Front

What does the image show when an atom of lithium loses an electron?

Back

It shows an atom of lithium losing an electron so it looks like helium.

Front

Define an ion.

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the charge of a potassium ion?

Back

K⁺¹.

Front

What is the charge of an oxide ion?

Back

O⁻².

Front

What is the significance of noble gases in relation to ion formation?

Back

Atoms tend to gain or lose electrons to achieve a stable electron configuration similar to that of noble gases.

Front

What is the mass of an atom measured in?

Back

Atomic mass units (amu).