NEW
Font size
Worksheets8.5A & 8.5B Review
Total questions: 18
Worksheet time: 36mins
An atom of which element has 37 protons, 48 neutrons and 1 valence electron? Hint: Use the Periodic Table!!
Neon (Ne)
Carbon (C)
Rubidium (Rb)
Sodium (Na)
An atom of which element is represented by this model?
Neon (Ne)
Boron (B)
Oxygen (O)
Carbon (C)
When trying to identify an unknown element, a scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?
The total number of neutrons in the unknown element
The total number of particles in the nucleus of the unknown element
The number of protons in the nucleus of the unknown element
The number of valence electrons in the unknown element
What part of the atom determines the identity of an atom?
Electrons
Neutrons
Protons
Nucleus
What part of the atom determines the chemical properties or reactivity?
Protons
Electrons
Valence Electrons
Energy levels
Which statement accurately describes atoms of Oxygen?
Oxygen atoms have 20 protons
Oxygen atoms have 8 valence electrons
Oxygen atoms have 16 neutrons
Oxygen atoms have 8 electrons
A chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determines the element's identity?
The number of electrons
The number of neutrons
The number of protons
The number of valence electrons
A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristics of calcium is most closely related to its chemical reactivity?
The 20 protons in each atom of calcium
The density of calcium
The atomic number
The two valence electrons in each atom of calcium
Where are electrons found in an atom?
In the nucleus together with protons
In planetary-like orbitals
Randomly scattered in a generally positive atom
In clouds around nucleus
An atom of which element is represented by this model?
Carbon (C)
Neon (Ne)
Sodium (Na)
Boron (B)
An atom consists of 12 protons, 12 electrons, and 12 neutrons. Which of the following can be used to identify the element?
Neutrons
Electrons
Atomic number
Atomic mass
An atom has 11 protons, 12 neutrons, and 11 electrons. What is the identity of the element?
Sodium
Titanium
Vanadium
Magnesium
How many valence electrons does the atom of Carbon-14, shown above have?
14
10
6
4
Valence electrons are electrons in the shell
furthest from the nucleus
closest to the nucleus
having the lowest energy level
that has the fastest electrons
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
How many Protons, Neutrons and Electrons are in an atom of Zirconium (Zr)? Hint: Use the Periodic Table!!
40 Protons, 40 Electrons, 51 Neutrons and an Atomic Mass of 91
91 Protons, 91 Electrons, 51 Neutrons and an Atomic Mass of 40
40 Protons, 40 Electrons, 40 Neutrons and an Atomic Mass of 91
40 Protons, 40 Electrons, 51 Neutrons and an Atomic Mass of 91
What is the Atomic Mass of Argon (Ar)?
18
40
39
22
Which of the following atoms has the lowest atomic mass?
