Atomic Structure

Question 1

how are electrons arranged in atoms

Answer 1

electrons are arranged at different distances from the nucleus

Question 2

where is most of the mass in an atom concentrated

Answer 2

most of the mass in an atom is concentrated In the nucleus

Question 3

what are molecules

Answer 3

molecules are two or more atoms chemically combined

Question 4

how is an atom made up

Answer 4

an atom has a positively charged nucleus which is orbited by negatively charged electrons

Question 5

in what environment would the relative mass of an atom change

Answer 5

it doesn’t change, mass is conserved in all environments

Question 6

is the nucleus or atom bigger

Answer 6

the atom is bigger as the nucleus is inside it

Question 7

what are the 3 things atoms are made up of

Answer 7

Electrons

Neutrons

Protons

Question 8

whats the relative mass

Answer 8

Number of Protons + Number of Neutrons

Question 9

whats the relative mass of protons and neutrons

Answer 9

the relative mass of protons and neutrons are both 1

Question 10

whats the relative mass of electrons

Answer 10

0.0005 (This gets rounded to zero)

Question 11

where are protons found

Answer 11

protons are found in the nucleus

Question 12

whats an elements atomic number equal to

Answer 12

an elements atomic number is the same as the number of protons

Question 13

where are electrons found

Answer 13

electrons are found in fixed orbit around the nucleus

Question 14

what does the total number of negative electrons equate to

Answer 14

the total number of negative electrons = the number of protons

Question 15

whats the relative charge of a neutron

Answer 15

0 as It is neutral

Question 16

where are neutrons found

Answer 16

like the proton, its found in the nucleus

Question 17

whats the relative atomic mass of neutrons

Answer 17

its 1

Question 18

whats the approximate size of an atom

Answer 18

0.1nM

Question 19

Where is most of the mass of an atom found

Answer 19

the nucleus