WorksheetsUnit 2 Practice
Total questions: 10
Worksheet time: 8mins
Name
Class
Date
1.
Which characteristic explains why helium, neon, and argon do not tend to form chemical bonds with other elements?
a)
Their outermost electron shells are completely filled
b)
They are gases at room temperature
c)
They are rare in Earth’s crust
d)
They have the smallest atomic radii
2.
What do sodium (Na) and argon (Ar) have in common, and how do they differ based on their positions on the periodic table?
a)
Both are in the same group, so they have the same number of valence electrons
b)
Both are in the same period, so they have the same number of electron shells, but sodium is more reactive
c)
Both are in the same period, so they have similar chemical properties
d)
Both are in the same group, so they have the same number of protons
3.
Which of the following statements is true about phosphorus (P), sulfur (S), and neon (Ne)?
a)
Phosphorus and sulfur are in the same group, so they have similar properties
b)
Sulfur and neon are both noble gases
c)
Sulfur and phosphorus have the same number of valence electrons
d)
Phosphorus and sulfur are in the same period, so they have the same number of electron shells
4.
An unknown element is identified as a very reactive metal. Based on its properties and position on the periodic table, which group is it most likely to belong to?
a)
Group 18, the far-right column
b)
Group 17, the second-to-last column
c)
Group 14, near the center of the table
d)
In group 1, the first column on the left
5.
Which element is most chemically similar to argon (Ar)?
a)
Helium (He)
b)
Oxygen (O)
c)
Sodium (Na)
d)
Sulfur (S)
6.
As you move from left to right across a period on the periodic table, what trend is observed?
a)
Elements become less stable
b)
Elements change from metals to nonmetals
c)
Elements become more reactive
d)
Elements change from gases to solids
7.
A neutral atom of magnesium (Mg) has an atomic number of 12 and an atomic mass of 24. How many protons, electrons, and neutrons does it have?
a)
12 protons, 12 electrons, 24 neutrons
b)
24 protons, 12 electrons, 12 neutrons
c)
12 protons, 12 electrons, 12 neutrons
8.
What does the atomic number of an atom tell you?
a)
The total number of protons and neutrons
b)
The number of electrons in all atoms
c)
The number of neutrons
d)
The number of protons in the atom
9.
What is a metalloid?
a)
An element with properties of both metals and nonmetals
b)
An element that is only found in nature
c)
An element with the same number of protons and electrons
d)
An element that is always a gas at room temperature
10.
Which part of the periodic table contains the majority of elements that are shiny, good conductors of electricity, and malleable?
a)
On the right side
b)
On the left side
c)
Only in periods 5 and 6
d)
Only at the top row
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