Practice Quiz (Modeling Atoms)

An (a)   is the smallest particle of an element that retains its identity in a chemical reaction.

• Atom
• Molecule

• Proton

• Neutron

Protons are (a)   charged subatomic particles.​ Neutrons are ​ (b)   charged subatomic particles. Electrons are ​​ ​ (c)   charged subatomic particles. ​

• Positively
• Negatively

• Neutrally

• negatively
• neutrally

Fill in the blank: The nucleus is made of (a)   and neutrons.

• Electrons

• Protons

• Quarks

• Photons

How many neutrons does an atom of Pt-200 have?

• 122

• 78

• 195

• 200

Organize these options into the right categories

Groups:

(a) Ions

,

(b) Isotopes

,

(c) Subatomic Particles

,

(d) Compounds

• CH₄ and KBr

• Ti-48 and T-50

• Al⁺³ and S^-2

• p⁺, n⁰, e^-

How many electrons does one atom of K⁺¹ have?

• 19

• 20

• 18

• 39

Match the following percent abundance of each isotope of Calcium, Ca.

• 96.941%

• Ca-48

• 0.187%

• Ca-40

• 0.647%

• Ca-42

An atom of Cu⁺² has ​ (a)   protons, (b)   neutrons, and ​ (c)   electrons.

• 36
• 29
• 27
• 63
• 65
• 34
• 31
• 67

A Bohr model shows an atom has 14 protons. What is the identity of this atom?

• F

• Sr

• N

• Si

Match the following

• Mg

• An atom of this element has an atomic mass of 30.97 amu.

• Al

• A neutral atom of this element has 12 electrons.

• P

• An atom of this element has 13 protons.

• Na

• An atom of this element has 4 energy levels.

• Br

• An atom of this element has 12 neutrons.