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Physical and Chemical Changes and The Atom NTI Day 3

Last updated about 2 years ago

8 questions

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Question 1

1.

Who is credited with developing the plum pudding model?

John Dalton

Ernest Rutherford

J.J. Thompson

Niels Bohr

Question 2

2.

Which of the following subatomic particles is negatively charged?

Photon

Electron

Proton

Neutron

Question 3

3.

The nucleus of an atom contains...?

Only protons

Electrons and protons

Protons and neutrons

Neutrons and electrons

Question 4

4.

How many protons does an atom of Carbon contain?

12

6

8

14

Question 5

5.

What is a characteristic of a physical change?

It can be reversed

It involves a chemical reaction

It changes the object's composition

It cannot be undone

Question 6

6.

What happens in a chemical change?

It can easily be reversed

No new substances are formed

New substances are formed

Existing matter is rearranged

Question 7

7.

What is the smallest unit into which a substance can be divided without changing its chemical properties?

Compound

Molecule

Atom

Element

Question 8

8.

What determines the type of chemical reactions an atom can undergo?

The total number of electrons

The number of neutrons

The number of valence electrons

The size of the nucleus