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.