different types of atoms

Question 1

atomic number

Answer 1

the number of protons in the nucleus of an atom

Question 2

mass number

Answer 2

the number ff protons and neutrons in the nucleus of an atom

Question 3

what is the top number and bottom

Answer 3

top = atomic number
bottom = mass numer

Question 4

what is an isotope

Answer 4

atoms of the same element with a different number of neutrons and different masses, but with the same number of protons

Question 5

ion

Answer 5

a positively or negatively charge or group of atoms, where the number of electrons is different to the number of protons

Question 6

cation

Answer 6

positive ion

Question 7

anion

Answer 7

negative ion

Question 8

relative mass of each particle

Answer 8

proton = 1
neutron = 1
electron = 1/2000

Question 9

relative charges of each particle

Answer 9

proton = +1
neutron = 0
electron = -1

Question 10

relative isotopic mass

Answer 10

the mass of an atom of an isotope compared with 1/12 of the mass of a carbon-12 atom

Question 11

what is the graph produce by a mass spectrometer called

Answer 11

mass spectrum

Question 12

what does a mass spectrum show

Answer 12

the relative isotopic masses and their relative abudnace

Question 13

axis of a mass spectrum

Answer 13

y-axis = abundance
x-axis = m/z (mass scale)

Question 14

what gives things specific chemical properties?

Answer 14

electrons

Question 15

relative atomic mass

Answer 15

the weighted mean mass of an atom of an element compared to 1/12 of the mass of a carbon-12 atom

Question 16

relative atomic mass equation

Answer 16

[(mass A x abundance A) + (mass B x abundance B) +……]/total abundance

Question 17

how to fid abundance when given the Mr and isotopes

Answer 17

[(mass A x Z) + (mass B x Y)]/100

Z + Y = 100

Y = 100 - Z

[(mass A x Z) + (mass B x (100 - Z)] = 100 x Mr

Question 18

When do you use relative formula mass

Answer 18

for giant structure

Question 19

when do you use relative molecular mass mass

Answer 19

for simple molecules

Question 20

what determines the properties of things?

Answer 20

electronic configuration / strucure