Atomic structure ✅

Question 1

what’s an atom

Answer 1

the simplest particle of an element that can exist on its own

Question 2

what are the three subatomic parts of an atom

Answer 2

protons neutrons electrons

Question 3

where is the proton found

Answer 3

nucleus (centre of the atom)

Question 4

where’s the neutron found

Answer 4

nucleus (centre of the atom)

Question 5

where are the electrons found

Answer 5

in the shell orbiting the nucleus

Question 6

why are atoms electrically neutral

Answer 6

they have equal numbers protons and neutrons. protons have positive charge and neutrons have negative charge

Question 7

what is the charge of a neutron

Answer 7

neutrons don’t have a charge

Question 8

relative mass of a proton

Answer 8

1

Question 9

relative charge of a proton

Answer 9

+1

Question 10

relative mass of a neutron

Answer 10

1

Question 11

relative charge of a neutron

Answer 11

0

Question 12

relative mass of an electron

Answer 12

1/1840

Question 13

relative charge of an electron

Answer 13

-1

Question 14

what is the atomic number
(the number of)

Answer 14

number of protons in an atom

Question 15

+

what is the mass number

Answer 15

total number of protons + total number of neutrons

Question 16

how do you work out the number of protons in an atom

Answer 16

look at the bottom number (the atomic number)

Question 17

how do you work out the number of neutrons in an atom

Answer 17

mass number - atomic number
top number - bottom numberhow do you work out the number of neutrons in an atom

Question 18

how do you work out the number of electrons in an atom

Answer 18

atomic number (bottom number)

Question 19

what is the relative atomic mass of an element
average of all

Answer 19

an average mass of all the isotopes of that element

Question 20

What do isotopes of the same element have in common?

Answer 20

They have the same chemical properties

Question 21

electrons

Why do isotopes of the same element exhibit the same chemical properties?

Answer 21

They have the same number of electrons in the outer shell.

Question 22

atoms with same… but diffrent

define an isotope

Answer 22

isotopes are atoms with the same atomic number but with different mass number

Question 23

what is the equation for calculating relative atomic mass

Answer 23

Σ(mass number x abundance) / Σ abundance

Question 24

• DO PAST PAPER QUESTION ON RELATIVE ATOMIC MASS*

Question 25

what are the mass of all atoms relatively measured to

Answer 25

the mass of all atoms is measured relative to the mass of an atom of carbon-12

Question 26

what did John dalton state in the early 1800s atoms

Answer 26

atoms were the smallest particles of matter

Question 27

what did J.J Thomson do in 1897

Answer 27

he proposed the plum pudding model

Question 28

what is the plum pudding model

Answer 28

negative electrons embedded in a positive sphere

Question 29

label the plum pudding model

Answer 29

Question 30

what did Ernest rutherford do in 1911 produced

Answer 30

produced a model where the electrons orbit a positive nucleus

Question 31

label Rutherfords model of the atom

Answer 31

Question 32

what did James Chadwick do in 1932

Answer 32

discovered the neutron

Question 33

why was the neutron discovered last

Answer 33

because it has no charge and difficult to detect

Question 34

how can the electronic configuration of an atom be determined at first glance from the periodic table

Answer 34

by using the group number and period number

Question 35

what can the group number tell us

Answer 35

the number of electrons in the outer shell

Question 36

what can the period number tell us

Answer 36

the number of shells in use

Question 37

name 3 noble gases that have full outer shells HAN

Answer 37

- helium - neon - argon

Question 38

what is the radius of an atom

Answer 38

0.1 nanometres

Question 39

what's the radius of a nucleus

Answer 39

1 × 10-14 m

Question 40

what is a compound

Answer 40

a substance formed when two or more different elements are chemically combined

Question 41

what's an ion

Answer 41

a charged particle

Question 42

what's a cation

Answer 42

a positive ion

Question 43

what an anion

Answer 43

a negative ion

Question 44

when is a simple ion formed

Answer 44

when an atom loses or gains electrons to achieve a full outer shell - to become stable

Question 45

what does the overall charge on an ion depend on

Answer 45

on the number of positive protons and negative electrons

Question 46

what do simple negative ions change their ending to

Answer 46

-ide e.g. chlorine forms chlorIDE ions (Cl-)

Question 47

fill in the gaps

Answer 47

Question 48

how do you work out the number of neutrons in an atom

Answer 48

mass number - atomic number top number - bottom number