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Question 1

What is the law of conservation of mass

Answer 1

In a chemical reaction the total mass of the reactants is the same as the total mass of the products

Question 2

what is a positive ion called

Answer 2

cations

Question 3

what is a negative ion called

Answer 3

anions

Question 4

what is an ion

Answer 4

an atom or group of atoms that have a positive or negative charge which are formed by the loss or gain of an atom.

Question 5

how does an atom become an ion

Answer 5

If an electron is removed or added to the last shell

Question 6

when do cations form

Answer 6

when an electron is lost from the last shell of the atom

Question 7

when do anions form

Answer 7

A
when an electron is added to the valance shell

Question 8

neutralsation

Answer 8

a reaction between an acid and a base. A salt and water are the products of these type of reactions

Question 9

everyday examples of neutralisation

Answer 9

Soil treatemnt
treatment of a wasp or bee sting
treatment of indigestion

Question 10

What charge does an atom have and why

Answer 10

neutral charge- number of protons=number of electrons
Positive charge- Number of protons is greater than the number of electrons
Negative charge- Number of electrons are greater than the number of protons.

Question 11

copper reacts with sulfur dioxide to form copper sulfide and oxygen gas. What are the reactants ?
1. Copper
2. Copper and sulfer dioxide
3. Copper sulfide and oxygen gas
4. copper, sulfur dioxide, copper sulfide and oxygen gas

Answer 11

Copper and sulfure dioxide

Question 12

A particle contains 20 protons 20 neutrons and 18 electrons THEREFORE
1. molecule
2. negative ion
3. postive ion
4. neutral ion

Answer 12

Positive ion