S1 Final - Unit 3 Review

Front

Who developed the planetary model of the atom?

Back

Bohr

Front

What is a negative subatomic particle?

Back

Electron

Front

What does the nucleus of an atom contain?

Back

Protons and neutrons

Front

How many protons does the isotope of titanium have?

Back

22

Front

What is the average mass of an element with 24.1% of isotopes at 75.23 amu, 48.7% at 74.61 amu, and 27.2% at 75.20 amu?

Back

74.92 amu

Front

Define an atom.

Back

The smallest unit of matter that retains the properties of an element.

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What is the charge of an electron?

Back

Negative.