Atomic Structure Test

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Atomic Structure Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Mass of a neutron is

A
same as proton

B
much less than that of proton

C
slightly less than that of proton

D
slightly more than that of proton

Solution

Mass of a neutron is slightly more than that of proton.
Question 2
1 / -0

Which one of the following may contain 11 neutrons, 10 electrons and 9 protons?

A
A cation

B
An anion

C
An isotope

D
A neutral atom

Solution

If an atom has 9 protons and 10 electrons means it has a negative one charge on it, thus it form an anion.
Question 3
1 / -0

Which of the following symbols represents a species containing 11 protons, 12 neutrons and 10 electrons?

A
²³Na⁺

B
²¹Ne

C
²³Na

D
²³Ne⁺

Solution

The particle that has 11 protons, 10 electrons and 12 neutrons is Na (Sodium cation).
Question 4
1 / -0

Atomic weight of a substance is equal to

A
equivalent weight ´ valency

B
equivalent weight ¸ valency

C
equivalent weight - valency

D
none of the above

Solution

Atomic weight of a substance = equivalent weight x valency
Question 5
1 / -0

If the tables of atomic masses were established with the oxygen atom, which was assigned the value of 100, then the atomic mass of the carbon atom would be approximately

A
24.0

B
12.0

C
75.0

D
112.0

Solution

If the tables of atomic masses were established with the oxygen atom, which was assigned the value of 100, then the atomic mass of the carbon atom would be approximately 75.0.
Question 6
1 / -0

How many neutrons are there in the chlorine element whose atomic mass is 35.5 u?

A
17

B
18

C
35.5

D
17.5

Solution

The element chlorine with relative atomic mass 35.5, consists of 17 protons, 18 neutrons and 17 electrons.
Question 7
1 / -0

The electronic configurations of elements A, B, C and D are (2, 8, 1), (2, 8, 2), (2, 8, 6) and (2, 8, 7) respectively. Which of these can make an ion with two negative charges?

A
A

B
B

C
C

D
D

Solution

The electronic configurations of element C is 2, 8, 6. Thus it accept two electrons to acquire stable noble gas configuration. Thus it form negative charge on it.
Question 8
1 / -0

Consider the following.
I. ZnSO₄
II. HNO₂
III. H₂SO₄
IV. CuSO₄

Which of the above contains univalent cations?

A
III and IV

B
II and III

C
I, II and IV

D
I and III

Solution

H⁺ ion is known as univalent cation. Thus from above given option HNO₂, H₂SO₄ contains univalent cations.
Question 9
1 / -0

What is the feature of atomic spectra?

A
Different atoms reflect light differently.

B
Protons exist in different energy levels.

C
Atoms are formed of seven orbitals.

D
Electrons exist in different energy levels.

Solution

The feature of atomic spectra is that electrons exist in different energy levels.

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Atomic Structure Test - 4

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Atomic Structure Test - 4

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Question 1

same as proton

much less than that of proton

slightly less than that of proton

slightly more than that of proton

Solution

Question 2

A cation

An anion

An isotope

A neutral atom

Solution

Question 3

23Na+

21Ne

23Na

23Ne+

Solution

Question 4

equivalent weight ´ valency

equivalent weight ¸ valency

equivalent weight - valency

none of the above

Solution

Question 5

24.0

12.0

75.0

112.0

Solution

Question 6

17

18

35.5

17.5

Solution

Question 7

A

B

C

D

Solution

Question 8

III and IV

II and III

I, II and IV

I and III

Solution

Question 9

Different atoms reflect light differently.

Protons exist in different energy levels.

Atoms are formed of seven orbitals.

Electrons exist in different energy levels.

Solution

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²³Na⁺

²¹Ne

²³Na

²³Ne⁺