Chapter 2.1 Basic Chemistry Review

Question 1

What is Matter

Answer 1

Matter is anything that takes up space and has mass.

Question 2

What are elements composed of?

Answer 2

Atoms

Question 3

What are the primary Elements of the Earth’s crust?

Answer 3

Al, Si, O

Question 4

What are the primary elements in organisms?

Answer 4

C.arbon H.ydrogen O.xygen. N.itrogen P.hosporus. Sulfur

Question 5

Sub-atomic particles

Answer 5

• Protons
• Electrons
• Neutrons

Question 6

All atoms of an elenent have the same………… which is called the………..

Answer 6

• Same number of protons

- Its called the atomic #

Question 7

Mass number = ………….

Answer 7

Mass number is equal to the number of protons + number of neutrons

Question 8

What are isotopes?

Answer 8

Isotopes are atoms of the same element that have the same number of lrotons but different number if neutrons therefore resulting in different atomic masses.

Question 9

What are radioactive isotopes?

Answer 9

These are unstable isotopes that release various types of energy in order to become stable.

Question 10

Uses of radioactive isotopes

Answer 10

• Medical testing and imaging

- High radiation to kill and damage cancer cells and sterilizing medical products.