Atom Structure And Isotopes: Quiz!
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- 1.In a neutral atom, the numbers of protons and electrons are _____.
- A.
Not the same
- B.
The same
- 2.The charge on an atom is _____.
- A.
Neutral
- B.
Negative
- C.
Positive
- 3.A neutral atom has 40 electrons and 46 neutrons. How many protons does it have?
- A.
40
- B.
46
- C.
86
- 4.A neutral atom has 22 electrons and 24 neutrons. What is its atomic number?
- A.
22
- B.
24
- C.
45
- 5.The atom's mass is found mostly in the atom's _____.
- A.
Nucleus
- B.
Protons
- C.
Electrons
- D.
Electron cloud
- 6.A particle has 25 protons, 22 electrons and 24 neutrons. Which of these statements is true?
- A.
The particle is an ion.
- B.
The particle is a neutral atom.
- 7.What is the atomic number of an atom that has 12 protons, 13 neutrons, and 12 electrons?
- A.
12
- B.
2
- C.
13
- D.
25
- 8.Two isotopes of the same element have the same number of _____.
- A.
Protons
- B.
Neutrons
- C.
Electrons
- D.
Atoms
- 9.The atomic number of an element tells us the number of protons and neutrons in a specific isotope.
- A.
False
- B.
True
- 10.The atomic number is the number of protons in the nucleus and it also identifies the element.
- A.
True
- B.
False
- 11.What makes isotopes of the same element different from each other?
- A.
The number of protons in their nucleus.
- B.
The number of neutrons in their nucleus.
- C.
The number of electrons they have.
- 12.Which is the correct symbol for an oxygen atom with 8 protons, 9 neutrons and 8 electrons?
- A.
16 O 8
- B.
17 O 8
- C.
18 O 8
- D.
18 O 9
- 13.A neutral atom has 22 electrons and 24 neutrons. What is its mass number?
- A.
46
- B.
24
- C.
45
- D.
22
- 14.A chemical symbol represents the _____ of an element.
- A.
Name
- B.
Reaction
- C.
Group
- D.
Structure
- E.
Type
- 15.Atoms of the same element with different numbers of neutrons are called _____.
- A.
Isotopes
- B.
Metals
- C.
Metalloids
- D.
Radioactive
- E.
Transition elements
- 16.A particle that moves around the nucleus is _____.
- A.
An electron
- B.
A proton
- C.
A quark
- D.
A neutron
- E.
An ion
- 17.A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____.
- A.
56
- B.
30
- C.
52
- D.
26
- 18.The charge on a proton is _____.
- A.
Positive
- B.
Negative
- C.
Neutral
- D.
The same as for an ion
- 19.The number of protons in an atom is called the _____.
- A.
Atomic number
- B.
Electron
- C.
Proton
- D.
Mass number
- E.
Neutron
- 20.The charge on a neutron is _____.
- A.
Positive
- B.
Negative
- C.
Neutral
- D.
The same as for an ion
- 21.The charge on an electron is _____.
- A.
Positive
- B.
Negative
- C.
Neutral
- D.
The same as for an ion
- 22.The central core of an atom is called the _____.
- A.
Nucleus
- B.
Atomic number
- C.
Proton
- D.
Electron
- E.
Neutron
- 23.The mass of a(n) _____ is about equal to the mass of a proton.
- A.
Neutron
- B.
Atomic number
- C.
Electron
- D.
Nucleus
- 24.The total number of protons and neutrons in an atom is the atom’s _____.
- A.
Mass number
- B.
Atomic number
- C.
Weight
Questions: 10 | Attempts: 11107 | Last updated: Apr 19, 2021
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