2021 Physical Science Final Review

Which of the following is NOT an accurate description of the nucleus?

• positively charged from the protons
• extremely dense from neutrons and protons
• negatively charged
• in the center of the atom

Which subatomic particle along with the protons make up the total mass of an atom.

• Neutron
• Electrons
• Valence electrons
• protons make up all the mass

Particles in an atom that are neutral and have no charge are

• negatrons

• electrons

• neutrons

• protons

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

How many electrons are in Gold

• 79

• 118

• 197

• 276

How many neutrons are in Gold

• 118

• 79

• 197

• 276

How many protons are in Neon

• 10

• 20

• 21

• 30

Which elements have the most similar chemical properties because they have the same number of valence electrons?

• boron and carbon

• oxygen and sulfur

• aluminum and bromine

• argon and silicon

The noble gases (group 8A) are the most reactive elements because of their full valence shells.

• True

• False

How many valence electrons does Hydrogen Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron