Chemistry Review - Fall 2022

What is the basic particle from which all elements are made of?

The positively charged center of an atom is called the

Surrounding the nucleus in a "cloud" are electrons which are _________ charged.

Aluminum, zinc, oxygen are examples of ____?

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Found in the nucleus of the atom

• electrons only
• protons only
• neutrons and protons
• neutrons and electrons

Isotopes of an element have a different number of...

• Protons

• Neutrons

• Electrons

• Mass

ALL atoms of the same element have:

• same number of proton

• same number of nucleon

• different number of neutron

• different number of electron

What subatomic particle changes in an ion?

• The number of electrons

• The number of protons

• The number of neutrons

Answer explanation

Atoms can only easily gain and lose electrons. They are in orbit, away from the nucleus.