Quiz: Atom Essentials Quiz


Atom Essentials QuizOnline version Quiz on atomic structure by Mariam 1 What is the nucleus of an atom mainly composed of? a Electrons and neutrons b Electrons and protons c Protons and neutrons d Quarks only 2 What determines the identity of an element? a Number of electrons b Number of protons (atomic number) c Number of neutrons d Mass of the nucleus 3 Which subatomic particle carries a negative charge? a Proton b Neutron c Positron d Electron 4 What is the atomic mass approximately equal to? a Number of orbitals b Number of electrons c Nucleus size d Sum of protons and neutrons 5 Which model introduced electrons in fixed orbits around the nucleus? a Rutherford model b Quantum model c Plum pudding model d Bohr model 6 What is an isotope? a Atoms with different numbers of electrons b Atoms with different numbers of protons c Atoms with the same number of protons but different neutrons d Ions with charge 7 Where are electrons most likely to be found? a In the nucleus and cloud equally b Inside the nucleus c Electron cloud/orbitals surrounding the nucleus d Only at fixed rings 8 What is the charge of a neutral atom? a Negative charge b Positive charge c Variable charge d No overall charge (0) 9 What does the valence electron number influence? a Isotopic decay rate b Nuclear stability c Atomic mass d Chemical properties and reactivity 10 Which force keeps electrons bound to the nucleus? a Weak nuclear force b Gravitational pull c Electromagnetic attraction between protons and electrons d Strong nuclear force Feedback 1 The nucleus contains protons (positive) and neutrons (neutral). Electrons orbit outside. 2 The atomic number equals the number of protons and defines the element. 3 Electrons are negatively charged; protons are positive; neutrons are neutral. 4 Atomic mass mostly comes from protons and neutrons in the nucleus. 5 Bohr proposed quantized orbits, a stepping stone to modern quantum theory. 6 Isotopes share atomic number but have varying neutrons, changing mass. 7 Electrons occupy orbitals in an electron cloud around the nucleus. 8 In a neutral atom, number of protons equals number of electrons. 9 Valence electrons determine bonding behavior and reactivity. 10 Coulomb attraction between negatively charged electrons and positively charged protons binds atoms.

1

What is the nucleus of an atom mainly composed of?

a

Electrons and neutrons

b

Electrons and protons

c

Protons and neutrons

d

Quarks only

2

What determines the identity of an element?

a

Number of electrons

b

Number of protons (atomic number)

c

Number of neutrons

d

Mass of the nucleus

3

Which subatomic particle carries a negative charge?

a

Proton

b

Neutron

c

Positron

d

Electron

4

What is the atomic mass approximately equal to?

a

Number of orbitals

b

Number of electrons

c

Nucleus size

d

Sum of protons and neutrons

5

Which model introduced electrons in fixed orbits around the nucleus?

a

Rutherford model

b

Quantum model

c

Plum pudding model

d

Bohr model

6

What is an isotope?

a

Atoms with different numbers of electrons

b

Atoms with different numbers of protons

c

Atoms with the same number of protons but different neutrons

d

Ions with charge

7

Where are electrons most likely to be found?

a

In the nucleus and cloud equally

b

Inside the nucleus

c

Electron cloud/orbitals surrounding the nucleus

d

Only at fixed rings

8

What is the charge of a neutral atom?

a

Negative charge

b

Positive charge

c

Variable charge

d

No overall charge (0)

9

What does the valence electron number influence?

a

Isotopic decay rate

b

Nuclear stability

c

Atomic mass

d

Chemical properties and reactivity

10

Which force keeps electrons bound to the nucleus?

a

Weak nuclear force

b

Gravitational pull

c

Electromagnetic attraction between protons and electrons

d

Strong nuclear force

Feedback

1

The nucleus contains protons (positive) and neutrons (neutral). Electrons orbit outside.

2

The atomic number equals the number of protons and defines the element.

3

Electrons are negatively charged; protons are positive; neutrons are neutral.

4

Atomic mass mostly comes from protons and neutrons in the nucleus.

5

Bohr proposed quantized orbits, a stepping stone to modern quantum theory.

6

Isotopes share atomic number but have varying neutrons, changing mass.

7

Electrons occupy orbitals in an electron cloud around the nucleus.

8

In a neutral atom, number of protons equals number of electrons.

9

Valence electrons determine bonding behavior and reactivity.

10

Coulomb attraction between negatively charged electrons and positively charged protons binds atoms.

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Atom Essentials Quiz

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Atom Essentials QuizOnline version

by Mariam

What is the nucleus of an atom mainly composed of?

What determines the identity of an element?

Which subatomic particle carries a negative charge?

What is the atomic mass approximately equal to?

Which model introduced electrons in fixed orbits around the nucleus?

What is an isotope?

Where are electrons most likely to be found?

What is the charge of a neutral atom?

What does the valence electron number influence?

Which force keeps electrons bound to the nucleus?

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