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Essential Chemistry for IGCSE - Atoms, Elements And Compounds (Section 2)

1
Which of the following is NOT a characteristic of metals?
Answer
(D)
Non-conductivity
2
Which term describes the ability of a metal to reflect light?
Answer
(C)
Luster
3
What is the name given to a group of atoms chemically bonded together?
Answer
(D)
Molecule
4
What does the number of valence electrons determine?
Answer
B
D
5
Which of the following best describes the relationship between an atom and its isotopes?
Answer
(B)
Isotopes have the same number of protons but different numbers of neutrons.
6
Which particle determines the identity of an element?
Answer
(C)
Proton
7
What is the maximum number of electrons that can occupy the first electron shell?
Answer
(A)
2
8
What is the significance of the number of protons in an atom?
Answer
(C)
It determines the element's identity.
9
What is the electron configuration of an atom determined by?
Answer
(C)
The atomic number of the atom.
10
What is the name of the force that holds protons and neutrons together in the nucleus?
Answer
(C)
Strong nuclear force
11
What are the properties of a metallic bond?
Answer
A
D
12
What is the relative mass of a neutron?
Answer
(B)
1
13
Which of the following is a characteristic of both metals and nonmetals?
Answer
B
C
14
What is the term for a positively or negatively charged atom?
Answer
(B)
Ion
15
What is the role of electrons in the atom?
Answer
(C)
Are involved in chemical bonding
16
What type of substance is air?
Answer
(C)
Mixture
17
What are valence electrons?
Answer
(C)
Electrons in the outermost shell.
18
What is the charge of an electron?
Answer
(B)
-1
19
Which of the following best defines a 'period' in the periodic table?
Answer
(B)
A horizontal row of elements.
20
Which of the following is NOT a subatomic particle?
Answer
(D)
Molecule
21
Which of the following are properties of a compound?
Answer
A
B
22
What is the name for the central part of an atom?
Answer
(B)
Nucleus
23
Which of the following is a property of non-metals?
Answer
(D)
Brittle
24
What happens to the number of electrons in a neutral atom?
Answer
(A)
It is always equal to the number of protons.
25
Which of the following is the best description of a metallic bond?
Answer
(B)
A bond between metal atoms
26
What are the isotopes of an element?
Answer
(A)
Atoms with the same atomic number but different mass numbers.
27
What is the relative charge of an electron?
Answer
(A)
-1
28
What is formed when atoms lose or gain electrons?
Answer
(B)
Ions
29
What type of elements are found in Group 18 of the periodic table?
Answer
(C)
Noble Gases
30
Which of the following is a property of metals?
Answer
B
C
31
What is the name given to a horizontal row in the periodic table?
Answer
(C)
Period
32
What type of elements are typically found on the left side of the periodic table?
Answer
(C)
Metals
33
Which of the following statements are true regarding metals?
Answer
A
C
D
34
What is true about all noble gases?
Answer
C
D
35
What determines the chemical properties of an element?
Answer
(C)
The number of electrons in the outermost shell (valence electrons).
36
If an atom has 8 protons, 8 neutrons, and 8 electrons, what is its atomic number?
Answer
(A)
8
37
What type of charge does the nucleus of an atom have?
Answer
(A)
Positive
38
Which of the following statements are correct regarding the properties of non-metals?
Answer
B
C
39
Which of the following are physical properties used to distinguish between a compound and a mixture?
Answer
A
C
40
What are the three main subatomic particles?
Answer
(B)
Protons, neutrons, and electrons
41
What is the name given to the outermost shell of electrons?
Answer
(A)
Valence shell
42
What are the properties of a mixture?
Answer
A
C
43
Which of the following is a characteristic of a non-metal?
Answer
(D)
Brittle.
44
What do elements in the same group (vertical column) of the periodic table have in common?
Answer
(C)
The same number of valence electrons.
45
In which part of the atom is the mass primarily concentrated?
Answer
(C)
Nucleus
46
What is the name for atoms of the same element with different numbers of neutrons?
Answer
(C)
Isotopes
47
What is the mass of an electron?
Answer
(C)
Very small, negligible compared to a proton or neutron
48
What are the smallest particles of an element that can exist?
Answer
(C)
Atoms
49
Which of the following properties is NOT a general property of metals?
Answer
(D)
Brittle
50
What can be said about the chemical properties of isotopes of an element?
Answer
A
C