Quiz about Exploring Atoms and Elements Quiz

Question 1

Which subatomic particle has a negative charge?

Accepted Answer

Electron

Answer

Proton

Answer

Neutron

Answer

Nucleus

Question 2

What is the chemical symbol for oxygen?

Accepted Answer

O

Answer

Ox

Answer

Oy

Answer

Og

Question 3

Who proposed the first widely accepted atomic theory?

Accepted Answer

John Dalton

Answer

Albert Einstein

Answer

Niels Bohr

Answer

J.J. Thomson

Question 4

Which of the following is a physical change?

Accepted Answer

Melting ice

Answer

Burning wood

Answer

Rusting iron

Answer

Baking a cake

Question 5

Which subatomic particles are found in the nucleus of an atom?

Accepted Answer

Protons and neutrons

Answer

Electrons only

Answer

Protons and electrons

Answer

Neutrons and electrons

Question 6

Which of the following is the correct chemical symbol for sodium?

Accepted Answer

Na

Answer

S

Answer

So

Answer

Sd

Question 7

Which element is most abundant in living matter?

Accepted Answer

Carbon

Answer

Nitrogen

Answer

Oxygen

Answer

Hydrogen

Question 8

Which scientist discovered the electron?

Accepted Answer

J.J. Thomson

Answer

Ernest Rutherford

Answer

Niels Bohr

Answer

James Chadwick

Question 9

Which of the following is a chemical change?

Accepted Answer

Burning paper

Answer

Boiling water

Answer

Dissolving sugar in water

Answer

Freezing juice

Question 10

If an atom has 6 protons, 6 neutrons, and 6 electrons, what is its atomic number?

Accepted Answer

6

Answer

12

Answer

18

Answer

3

Question 11

Given the chemical symbol $$C$$ , which element does it represent?

Accepted Answer

Carbon

Answer

Calcium

Answer

Chlorine

Answer

Copper

Question 12

How did the discovery of the nucleus change the model of the atom?

Accepted Answer

It showed atoms have a dense center

Answer

It showed atoms are indivisible

Answer

It showed atoms are made only of electrons

Answer

It showed atoms are flat

Question 13

Which of the following best describes a physical change?

Accepted Answer

The substance changes state but keeps its identity

Answer

A new substance is formed

Answer

The substance burns

Answer

The substance reacts with acid

Question 14

An atom of oxygen has 8 protons, 8 neutrons, and 8 electrons. If it gains 2 electrons, what is its new charge?

Accepted Answer

$$-2$$

Answer

$$+2$$

Answer

$$0$$

Answer

$$+8$$

Question 15

A scientist analyzes a sample of ocean water and finds it contains mostly hydrogen and oxygen. What does this suggest about the composition of ocean water?

Accepted Answer

It is mostly made of water molecules

Answer

It is mostly made of carbon dioxide

Answer

It is mostly made of nitrogen gas

Answer

It is mostly made of salt

Question 16

A student is asked to compare the Bohr model and the modern model of the atom. Which statement best describes a key difference?

Accepted Answer

The Bohr model has electrons in fixed orbits; the modern model has electrons in probability clouds.

Answer

Both models have electrons in fixed orbits.

Answer

The modern model has no nucleus.

Answer

The Bohr model has no protons.

Question 17

A student observes that when vinegar is mixed with baking soda, bubbles form and a new substance is created. What type of change is this?

Accepted Answer

Chemical change, because a new substance is formed

Answer

Physical change, because the substances are just mixed

Answer

Physical change, because bubbles always mean a physical change

Answer

No change occurs

Exploring Atoms and Elements Quiz

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