Reactions/The periodic table

Question 1

rate of reaction

Answer 1

the speed of a reaction

Question 2

conditions of a reaction

Answer 2

can be used to change reaction rate
temperature
concentration
surface area of solid reactants

Question 3

successful collision

Answer 3

giving a reaction

Question 4

unsuccessful collision

Answer 4

gives no reaction

Question 5

collision theory

Answer 5

the theory that the more successful collisions taking place the faster the reaction

Question 6

formula for average rate of a reaction

Answer 6

change in quantity
——————————
change in time (s)

Question 7

elements

Answer 7

substances made up of one type of atom

Question 8

compounds

Answer 8

substances made of more than one type of atom

Question 9

proton

Answer 9

atomic mass: 1 a.m.u
positive charge
in the nucleus of an atom

Question 10

neutron

Answer 10

mass: 1 a.m.u
no charge
in the nucleus

Question 11

electron

Answer 11

mass: negligible (1/2000)
negative charge
in the electron cloud of the atom

Question 12

paired electrons

Answer 12

take no part in reactions

Question 13

unpaired electrons

Answer 13

take part in reactions because they can bond with other atoms
the number of unpaired electrons in the outer shell tell us it’s valency

Question 14

isotope

Answer 14

an atom of an element that has the same atomic number but different atomic mass number
isotopes of the same element will have a different number of neutrons

Question 15

what is the outer electron arrangement the same as?

Answer 15

the group number

Question 16

how many electrons is the first shell filled by?

Answer 16

two

Question 17

how many electrons is any except for the first filled by?

Answer 17

eight