Atomic structure

Question 1

Atomic number

Answer 1

Number of protons or electrons in an atom

Question 2

mass number

Answer 2

number of protons + neutrons in an atom

Question 3

Isotopes

Answer 3

atoms of the same element that have the same number of protons but different number of neutrons

Question 4

Relative atomic mass

Answer 4

average mass of one atom in an element compared to 1/12 of the mass of carbon-12

Question 5

Protons charge, mass and location

Answer 5

+1 charge and mass and is located in the nucleus of an atom

Question 6

Neutron charge, mass and location

Answer 6

0 charge, +1 mass , and is located in the nucleus

Question 7

Electron charge, mass and location

Answer 7

-1 charge, 0 mass and is located in shells outisde of the electron

Question 8

Formula to find no. neutrons with atom + mass number

Answer 8

Mass number - Atomic number = no. of neutrons

Question 9

Relative isotopic mass

Answer 9

Mass of isotope of one atom compared to the mass of an atom of carbon- 12

Question 10

How to find the RAM of a mixture of isotopes

Answer 10

Multiply the percentage of each isotope by its atomic mass and add them together over 100

Question 11

How to calculate empirical formula

Answer 11

write each mass of each element in g,
then find the mr of each element
find the moles using mass/mr
divide the moles of that element by the smallest no. of moles calculated
round no. to whole number nd write in formula

Question 12

charge, mass deflection of an alpha particle

Answer 12

+2 charge, 4 mass, stopped by paper, with a small deflection

Question 13

charge, mass deflection of a beta particle

Answer 13

-1charge, very small mass, stopped by aluminium with a large deflection