BIG DADDY TOPIC 1

Question 1

Balance the equation: Fe+Cl2—–>FeCl3

Answer 1

2Fe+3Cl2—->2FeCl3

Question 2

what is the formula for water

Answer 2

H2O

Question 3

what is the formula for ammonia

Answer 3

NH3

Question 4

what is the formula for ammonium

Answer 4

NH4+

Question 5

what is the formula for nitrate and sulfate

Answer 5

NO3- SO42-

Question 6

what are the formula for hydroxide and carbonate

Answer 6

OH- CO32-

Question 7

how do you write ionic equations

Answer 7

take out any aqueous ions that are present on both sides of the equation

Question 8

what does the nucleus of an atom contain

Answer 8

protons and neutrons

Question 9

how do calculate the amount of neutrons in an atom

Answer 9

subtract the atomic number from the mass number

Question 10

what are isotopes

Answer 10

are different forms of the same element, which have the same number of protons but a different number of neutrons

Question 11

how do you calculate the relative atomic mass of an element from its isotopic abundances

Answer 11

multiply each relative atomic mass by its isotopic abundance and add up the result, divide by sum of abundance

Question 12

what side of the periodic table are the metals

Answer 12

left

Question 13

what type of diagram do you use to show an ionic bond

Answer 13

dot and cross

Question 14

what is an ionic bond

Answer 14

when a metal and a non metal react together, the metal atoms loses electrons to form a positive ion and the non metal gains these electrons to form a negative ion

Question 15

what structure do ionic compounds

Answer 15

regular lattice structure

Question 16

what are the properties of ionic compounds

Answer 16

high melting and boiling points, don’t conduct electricity, dissolve in water and conduct electric currents when in the solution

Question 17

adv and disadv of 2D representations

Answer 17

show what atoms there are and how they are connected, don’t give idea of size and shape

Question 18

adv and disadv of dot and cross

Answer 18

show how things are formed and where the electrons came from but dont show size or arrangement

Question 19

adv and disadv of 3D models

Answer 19

show arrangement but only show outer layer of substance

Question 20

adv and disadv of ball and stick models

Answer 20

help visualize structure, realistic but make it seem like there are big gaps between atoms dont show correct scales of atoms or ions

Question 21

what is a covalent bond

Answer 21

a strong bond that forms when a pair of electrons is shared between two atoms

Question 22

what are the properties of simple molecular substances

Answer 22

melting and boiling points very low, gases or liquids at room temp, dont conduct electricity

Question 23

what are the properties of giant covalent structures

Answer 23

high melting and boiling points, don’t conduct electricity apart from graphite and graphene, aren’t soluble

Question 24

tell me about diamonds

Answer 24

made up of a network or carbon atoms, four covalent bonds, high bp and mp, its rlly hard ;) doesnt conduct electricity

Question 25

tell me about graphite

Answer 25

three covalent bonds, sheets of atoms in hexagons, ideal lubricating material ;) high mp, conduct electricity

Question 26

tell me about graphene

Answer 26

one layer of graphite, one atom thick sheet

Question 27

what is metallic bonding

Answer 27

the electrons in the outer shell of the metal atoms are delocalised, strong forces between positive metal ions and negative electrons

Question 28

properties of metals

Answer 28

strong, high mp and bp, shiny at room temp, not soluble, dense, some malleable, good conductors

Question 29

in a chemical reaction what does it tell you if the mass has increased

Answer 29

one of the reactant is gas and the products are aqueous, solids or liquids

Question 30

in a chemical reaction what does it tell you if the mass decreases

Answer 30

reactants are solids, liquids or aqueous and one of the products is a gas

Question 31

how to calculate number of moles

Answer 31

mass in g/ Mr of compound or Ar of element

Question 32

how to calulate the concentration

Answer 32

mass/volume

Question 33

how do you find the empirical formula

Answer 33

work out how many moles of each element you have, then work out the smallest whole number ratio

Question 34

what is a limiting reactant

Answer 34

that reactant that's used up, once used up the reaction will stop