Topic 1 - Elements, Compounds + Mixtures

Question 1

What is an Element?

Answer 1

Substance that consists of only one type of atom, cannot be broken down into anything simpler by chemical means.

Question 2

What are all substances made of?

Answer 2

Different atoms

Question 3

Name 2 Types of particles in an element.

Answer 3

atoms (simplest particles, can exist on their own) eg gold.
molecules (two or more ATOMS joined) eg oxygen.

Question 4

What is the appearance and state of iron filings?

Answer 4

shiny, hard. Solid

Question 5

what state and appearance is carbon?

Answer 5

hard, brittle, black. Solid.

Question 6

what is the state and appearance of aluminium?

Answer 6

Shiny grey. Solid

Question 7

What state and appearance is oxygen?

Answer 7

Not visible. Gas

Question 8

What state and appearance is copper?

Answer 8

Shiny, bendy. Solid

Question 9

What state and appearance is magnesium?

Answer 9

Silver ribbon. Solid

Question 10

What state and appearance is hydrogen?

Answer 10

Not visible. Gas

Question 11

What state and appearance is sulfur?

Answer 11

Bright yellow. Solid

Question 12

What state and appearance is bromine?

Answer 12

Dull, brown. Liquid

Question 13

What state and appearance is calcium?

Answer 13

Dull, grey. Solid.

Question 14

What does Malleable mean?

Answer 14

Can be hammered into shape.

Question 15

What does ductile mean?

Answer 15

Can be drawn into wires.

Question 16

What is an atom?

Answer 16

Simplest particle of an element, can exist on its own in a stable environment.

Question 17

How many element are in the Periodic Table?

Answer 17

Approx 100.

Question 18

What is a period in the periodic table?

Answer 18

A horizontal row.

Question 19

What is a group in the Periodic Table?

Answer 19

A vertical column.

Question 20

What is the writing structure for Elements in the periodic table?

Answer 20

The first letter is a Capital and second is a lowercase letter.

Question 21

Name 3 properties of metallic elements.

Answer 21

All solids at room temp. except mercury
shiny solids
Good conductors electricity/heat
Usually have high melting + boiling points
Usually malleable + ductile

Question 22

Name 3 properties Non-Metallic Elements

Answer 22

soft + brittle diamond is exception
Poor conductors of heat/electricity usually
Usually have low melting + boiling points
Usually dull (diamond is exception)
Can be gas, solid or liquid at room temp

Question 23

What is a compound?

Answer 23

Substance formed when 2 or more (different) elements are chemically combined.

Question 24

What are particles in a compound called?

Answer 24

Molecules

Question 25

Name 1 thing about compounds

Answer 25

They have completely different properties from elements which are used to make them.

Question 26

When would a compound end in -ide ?

Answer 26

If it contains 2 elements
E.g iron + sulfur = iron sulfide.

Question 27

When would a compound end in -ate ?

Answer 27

If it contains 3 elements or more. (One of which is oxygen).
E.g sodium + nitrogen + oxygen = sodium nitrate.

Question 28

What is a mixture?

Answer 28

2 or more substances mixed together. Usually easy to separate.

Question 29

Mixtures can be either a mix of ;

Answer 29

Elements
Element + Compound
Compound

Question 30

What is a common compound?

Answer 30

Eg Water, H2O, (small 2).
State of Compound: Liquid
Elements Present in Compound: 2 Hydrogen, 1 oxygen.
State of each element: H- gas. O- gas.