Matter Part 2

Question 1

What are elements ?

Answer 1

Elements are a substance that is made up of only one type of atom .

Question 2

What do compounds always contain?

Answer 2

A compound always contains a particular amount of each element. it has a fixed composition - a fixed amount of atoms in each molecule, example: H2O( two hydrogen atoms to one oxygen atom)

Question 3

Naming compound steps

Answer 3

1. ) write down the name of the metal
2. )write down the name of the non-metal
3. ) change the ending of the non-metal to the word to “ide”
   e. g. magnesium+oxygen= magnesium oxide

Question 4

Steps for compounds containing more than two elements, compounds containing two elements plus oxygen.

Answer 4

1.) write down the name of the metal
2.) write down the name of the non-metal
3.)for the non-metal word, change the ending to “ate”
E.g:aluminium + bromine + oxygen = aluminium bromate

Question 5

When Writing the formula for compounds what comes first?

Answer 5

The metal

Question 6

For every titanium atom, there are two oxygen atoms.
TI
O

Answer 6

T I O2

Question 7

For every aluminium atom, there are three chlorine atoms
Al
Cl

Answer 7

AL CL3

Question 8

LI2 0

Answer 8

For every two lithium atoms, there is one oxygen atom

Question 9

Explain the amount of atoms, and the composition of atoms in a compound .

Answer 9

A compound always contains a particular amount of each element. It has a fixed composition – a fixed amount of atoms in each molecule,e.g.H2O

Question 10

What is the reactant?

Answer 10

The two elements that make up a compound

e.g. reactants in H2O are both oxygen and hydrogen

Question 11

What is a product?

Answer 11

A product is what is made out of the reactants, products are the chemically bonded elements.
e.g. in water H2O is the product of the reactants hydrogen and oxygen.

Question 12

What are the four tell-tale signs of a chemical reaction?

Answer 12

1. )The temperature of the test tube increases
2. ) the colour changes
3. ) it changes state
4. ) bubbling happens

Question 13

What is a compound?

Answer 13

A compound is a substance made of two or more elements, chemically bonded.
e.g. sodium chloride, water

Question 14

What are the products and reactants in the water?

Answer 14

Hydrogen and oxygen =reactants

H2O=products

Question 15

In CU  S  O4, 
How many atoms are there in total? 
How many elements are they in total ?
What is it called ?
How many molecules are in there?
Is this a compound?

Answer 15

How many atoms are there in total? 💕6 atoms 💕
How many elements are they in total ?💕3 elements 💕
What is it called ?💕copper sulphate 💕
How many molecules are in there?💕1💕
Is this a compound?💕yes💕

Question 16

What is a molecule?

Answer 16

A molecule is two atoms chemically bonded .

some molecules are compounds, because they can be made up of two elements
although some molecules are only two of the same elements chemically bonded

Question 17

What does combining the symbols of the atoms in a molecule or compound do?

Answer 17

It gives you the formula for the molecule/compound

Question 18

Remember… just to clarify …

Answer 18

The atoms of some elements join together in molecules. Molecules are made of of two or more atoms chemically bonded. Molecules can be formed by two or more atoms of the same element, or by atoms from two or more different elements.

Question 19

Definition of a substance…

Answer 19

A substance is a material or matter that something is made out of

Eg;
Water,paint, glass, stone, metal,air, sugar,salt.

Question 20

Explain the atoms of an element.

Answer 20

All atoms in elements are the same.

Question 21

What is the smallest part of an element that can exist.

Answer 21

The smallest part of an element that can exist is called an atom.

Question 22

Compare the particles in different elements.

Answer 22

The atoms of an element are different to other elements’ atoms.

Question 23

The periodic table is in my science folder in OneDrive for assistance.

Answer 23

…

Question 24

What is a polymer?

Answer 24

Polymers are very long molecules made up of identical repeating groups of atoms.
Eg:nylon,polyester,Teflon,silk,wool,DNA

Question 25

What do different groups of polymers do?

Answer 25

Different groups of polymers give very different properties.Polymers can be deigned to have different particular uses.
Eg:
DNA and Teflon
Silk and nylon