LESSON 4

Question 1

Who studied the weights of various elements and compounds. He noticed that matter is always combined in fixed ratios based on weight or volume in the case of gases.

Answer 1

John Dalton

Question 2

It is the building blocks of matter. They are the smallest particles of an element that still have the element’s properties.

Answer 2

Atoms

Question 3

What Subatomic Particles has a positive electric charge?

Answer 3

Protons

Question 4

What Subatomic Particles has a negative electric charge?

Answer 4

Electrons

Question 5

What Subatomic Particles has a neutral in electric charge.

Answer 5

Neutrons

Question 6

It is defined as the total number of protons and neutrons in an atom.

Answer 6

Mass Number

Question 7

How do you get the Mass Number?

Answer 7

Atomic Number + Number of Neutrons

Question 8

How do you get Neutrons

Answer 8

Mass Number - Atomic Number

Question 9

It means an atom that have the same atomic number but different mass numbers due to a change in the number of neutrons.

Answer 9

Isotopes