chemistry

Question 1

why do atoms have no overall charge?

Answer 1

equal number of protons and electrons that cancel each other out

Question 2

where can you find the overall no of protons ?

Answer 2

atomic number in an atom (bottom)

Question 3

what are isotopes ?

Answer 3

atoms of the same element(protons) but different neutrons

Question 4

what do you call atoms that gain or loose electrons and how do you show mg and br?

Answer 4

IONS Mg2- ,Br1+

Question 5

independent ,dependant,control?

Answer 5

change,measure,keep the same

Question 6

synonyms for solution

Answer 6

concentration or volume

Question 7

synonyms for solid

Answer 7

mass or surface area

Question 8

what is the equations for moles ?

Answer 8

mass/mr

Question 9

what is ionic bonding ?

Answer 9

the strong electrostatic force between a positive and negative charge ion

Question 10

what is metallic bonding ?

Answer 10

the electrons in the outer shell are de-localised so they are free to move around the structure

Question 11

the only non-metal in a compound (oxygen) =

Answer 11

+oxygen

Question 12

the non-metal in a compound =

Answer 12

+ide e.g(chloride)

Question 13

oxygen and another non-metal in a compound become=

Answer 13

+ate e.g chlorine and oxygen become chlorate

Question 14

relative atomic mass (mr)equation=

Answer 14

adding together the relative atomic masses shown

Question 15

how are ionic compounds held together?

Answer 15

by strong electrostatic force of attraction of opposite charges

Question 16

what do ionic compounds form?

Answer 16

giant ionic lattice

Question 17

what are the properties of giant ionic lattice?

Answer 17

strong,high mp and bp,can conduct when in molten or in solution

Question 18

what are the properties of simple covalent bonds?

Answer 18

covalent bonds within the molecules strong,the forces between molecules are weak