Chemistry: properties & changes & periodic table

Question 1

Which is the name for the rows in the periodic table?

Accepted Answer

Periods

Question 2

What is the property of metals that allows them to be hammered into thin sheets?

Accepted Answer

Malleability

Question 3

What forms when atoms of different elements chemically join?

Accepted Answer

A compound

Question 4

The number of protons in an atom of an element

Accepted Answer

Atomic Number

Question 5

True or False: Most of the elements on the periodic table are Metals.

Accepted Answer

True

Question 6

Which of the following is a clue that a chemical change has taken place?

Accepted Answer

You observe the colour of a chemical

Question 7

Elements used to make semi-conductors are called:

Accepted Answer

Metalloids

Question 8

The symbol P stands for which element?

Accepted Answer

Phosphorus

Question 9

Which of the following is a physical property of steel?

Accepted Answer

It is hard

Question 10

Which of the following is a chemical property?

Accepted Answer

Ability to burn

Question 11

Which of the following is a physical change?

Accepted Answer

melting chocolate

Question 12

In a chemical change:

Accepted Answer

a new substance with new properties is formed

Question 13

Which of the following is a list of characteristic physical properties?

Accepted Answer

density, melting point, and freezing point

Question 14

The ability of an element to be drawn into a wire is called:

Accepted Answer

Ductility

Question 15

All of the following are physical changes except one. Select the chemical change below.

Accepted Answer

When bread is baked, it forms a golden brown crust

Question 16

How many electrons can fit onto the second valence shell of a given element?

Accepted Answer

8

Question 17

The level of shininess or dullness is known as........

Accepted Answer

lustre

Question 18

All living things on Earth have this element inside them

Accepted Answer

Carbon

Question 19

Neutrons are found:

Accepted Answer

Inside the nucleus and weigh the same as protons

Question 20

At the boiling point, a substance changes rapidly from:

Accepted Answer

A liquid to a gas

Questions 20