Atomic Structure - IGCSE paper 1

Note: Periodic Table is provided in paper 1, use the table if necessary when answering questions.

Atomic Structure

S94 Question 5
The diagram shows an atom of boron. What is the proton (atomic) number and nucleon(mass) number of  boron? 




Ans:  5, 11
nucleon(mass) number = proton + neutron



W94 Question 5
The diagram represents an atom.  What is the atomic number of this atom?



Ans:  3
Atomic number = proton number




S98 Question 5
An atom of any element must contain equal numbers of
A   electrons and neutrons.
B   electrons and protons.
C   neutrons and protons.
D   electrons, neutrons and protons.


Ans: B



S98 Question 6
Which of the following has a nucleon (mass) of 3?



Ans:  C
mass = protons + neutrons



S99 Question 5
How many protons, neutrons and electrons are present in an atom of the element with proton (atomic) number 6 and nucleon (mass) number 14?


protons
neutrons
electrons
A
6
8
6
B
6
8
8
C
8
6
6
D
8
6
8



Ans:  A
protons =electrons, mass = protons+neutron  


W00 Question 5
The diagrom represents an atom.

What is the proton number (atomic number) of this atom?
A   2           B   4          C   9          D   13



Ans: B


S01 Question 5
The Table shows the particles in an atom.

particle
charge
approximate relative mass
proton
+1
1

electron

1/2000

neutron
0
1


Which number completes the table?
A   -1          B    0          C   +1          D   +2


Ans: A


S02 Question 6
The diagram shows the electronic structure of an atom. What is the number of protons in the nucleus?



Ans:  13
protons = electrons

Isotopes 

W94 Question 6
Deuterium and tritium are isotopes of hydrogen. What are the correct numbers for X and Y?


isotope
number of protons
number of neutrons
number of electrons
nucleon (mass) number
Deuterium
1
1
1
X
tritium
1
2
1
Y


X
Y
A
B
C
1
1
2
1
2
3
D
3
4


Ans: C


S95 Question 8
The atoms of the isotopes of an element all contain the same number of

A    protons.
B    neutrons.
C    electrons and neutrons.
D    protons, neutrons and electrons.

Ans: A

S96 Question 8
The diagram shows the structure of an atom.

 Which diagram shows the structure of an isotope of this atom?


Ans: A
S98 Question 6
Which two diagrams show two different types of atom of the same element?


Ans: A

W99 Question 5
To be updated soon

S01 Question 6
The table gives the number of protons, neutrons and electrons in four particles; 1, 2, 3 and 4.



number of

particle
protons
neutrons
electrons
1
11
12
10
2
11
12
11
3
11
13
11
4
12
11
10


Which particles are atoms that are isotopes of each other?

A    1 and 2
B    1 and 4
C    2 and 3
D    3 and 4



Ans: C



W02 Question 5
The diagrams show the nuclei of four different atoms.


Which two atoms are isotopes of each other?
A   Q and R          B   Q and T          C   R and S          D   S and T



Ans: A
nuclei is plural  form of nucleus

S03 Question 5
Which number in the table is -1?

Particle
charge
relative mass
electron
A
B
neutron
C
1
proton
D
1


Ans: A



S94 Question 9
What are the correct symbols for the elements chlorine, nitrogen and bromine?
  


Ans: Cl (chlorine)
 N (nitrogen)
 Br (bromine)


S94 Question 6 
Which of the diagram represents a noble gas? 




Ans:   D
noble gas, group 0, has 8 electrons in the outermost shell
to be updated later.


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