Science - Chemistry

Question 1

What are the 3 states of matter

Answer 1

Solid, Liquid and Gas

Question 2

Define how solids are arranged

Answer 2

Stick to one another and vibrate and don’t move

Question 3

Define how liquids are arranged

Answer 3

they flow but are still connected

Question 4

Define how gasses are arranged

Answer 4

Widely spaced

Question 5

How many chemical elements are there in the periodic table

Answer 5

118

Question 6

Is helium a solid, liquid or a gas? Is it made up of atoms or molecules?

Answer 6

Helium is a gas made up of atoms. Each particle is on its own and they are far apart, arranged in a random way.. If it was made of molecules, they would be in clusters of two or more.

Question 7

What is the formula of water

Answer 7

H₂O

Question 8

What is the formula of carbon dioxide

Answer 8

CO₂

Question 9

Whereabouts on the periodic table are the non-metals found?

Answer 9

On the right.
The non-metal elements are found on the right-hand side of the periodic table, and metals on the left and in the middle.

Question 10

Which technique is most likely to be used to separate the elements which are bonded together in a compound?

Answer 10

Thermal decomposition.
Thermal decomposition can be used to break down some compounds into elements. Simple techniques like filtration and evaporation will not work, but they can be used for separating mixtures.