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1 The table gives the composition of three particles.
number of number of number of
particle
protons electrons neutrons
A 15
5 15 16
B 15
5 15 16
C 15
5 15 17
(a) What is the evidence in the table for each of the following?
(i) Particle A is an atom.
Particle A is an atom as it has the same number of protons and electrons
[1]
(ii) A, B and C are all particles of the same element.
A, B, and C are all particles of the same elements as they all have the same proton numb
[1]
(iii) Particles A and C are isotopes of the same element.
Particles A and C are isotopes of the same element as both of them has the same
proton number but different nucleon number.
[2]
(b) (i) What is the electronic structure of particle A?
2,8,5 [1]
(ii) Is element A, a metal or a non-metal? Give a reason for your choice.
Element A is a non-metal because it accepts electrons as it is easier for it to gain
than lose electrons and therefore need 3 more electrons to complete its outermost shell.
Non-metals tend to have 4 or more electrons in their outermost [1]
shell whereas metals tend to have less than 4 electrons.
[Total: 6]
PhysicsAndMathsTutor.com
, 2 Protons, neutrons and electrons are subatomic particles.
(a) Complete the table to show the relative mass and relative charge of a proton, a neutron and an
electron.
particle relative mass relative charge
proton
1 +1
neutron
1 0
1
electron
1840 -1
[3]
(b) Bromine has two isotopes.
(i) Define the term isotope.
Isotopes are atoms of the same element that contain the same number of proton and
.............................................................................................................................................
electrons but different number of neutrons in their nuclie, some isotopes are radioactive
because their nuclie are unstable.
....................................................................................................................................... [2]
(ii) Explain why the two isotopes of bromine have the same chemical properties.
Both of the bromine isotopes have the same chemical properties because they have the
.............................................................................................................................................
same number of electrons in their outermost shell, these are responsible for the chemical
trait of the isotopes as they are the only particles changing in number in any reaction.
....................................................................................................................................... [2]
(c) The table shows the number of protons, neutrons and electrons in some atoms and ions.
Complete the table.
number of number of number of
particle
protons neutrons electrons
7
3 Li 3 4 3
34 2-
16 S 16 18 18
41 19 22 18
19K+
[5]
[Total: 12]
PhysicsAndMathsTutor.com
1 The table gives the composition of three particles.
number of number of number of
particle
protons electrons neutrons
A 15
5 15 16
B 15
5 15 16
C 15
5 15 17
(a) What is the evidence in the table for each of the following?
(i) Particle A is an atom.
Particle A is an atom as it has the same number of protons and electrons
[1]
(ii) A, B and C are all particles of the same element.
A, B, and C are all particles of the same elements as they all have the same proton numb
[1]
(iii) Particles A and C are isotopes of the same element.
Particles A and C are isotopes of the same element as both of them has the same
proton number but different nucleon number.
[2]
(b) (i) What is the electronic structure of particle A?
2,8,5 [1]
(ii) Is element A, a metal or a non-metal? Give a reason for your choice.
Element A is a non-metal because it accepts electrons as it is easier for it to gain
than lose electrons and therefore need 3 more electrons to complete its outermost shell.
Non-metals tend to have 4 or more electrons in their outermost [1]
shell whereas metals tend to have less than 4 electrons.
[Total: 6]
PhysicsAndMathsTutor.com
, 2 Protons, neutrons and electrons are subatomic particles.
(a) Complete the table to show the relative mass and relative charge of a proton, a neutron and an
electron.
particle relative mass relative charge
proton
1 +1
neutron
1 0
1
electron
1840 -1
[3]
(b) Bromine has two isotopes.
(i) Define the term isotope.
Isotopes are atoms of the same element that contain the same number of proton and
.............................................................................................................................................
electrons but different number of neutrons in their nuclie, some isotopes are radioactive
because their nuclie are unstable.
....................................................................................................................................... [2]
(ii) Explain why the two isotopes of bromine have the same chemical properties.
Both of the bromine isotopes have the same chemical properties because they have the
.............................................................................................................................................
same number of electrons in their outermost shell, these are responsible for the chemical
trait of the isotopes as they are the only particles changing in number in any reaction.
....................................................................................................................................... [2]
(c) The table shows the number of protons, neutrons and electrons in some atoms and ions.
Complete the table.
number of number of number of
particle
protons neutrons electrons
7
3 Li 3 4 3
34 2-
16 S 16 18 18
41 19 22 18
19K+
[5]
[Total: 12]
PhysicsAndMathsTutor.com
