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WorksheetsUNIT 1 Review (Virtual, Fall 2020)
Total questions: 18
Worksheet time: 17mins
What are the 3 subatomic particles that make-up the atom?
protons, neutrons, and isotopes
neutrons, isotopes, and electrons
protons, neutrons, and electrons
The center or middle of an atom is known as the
nucleus
electron cloud
neutron cloud
mass circle
Neutrons have a ___________ charge.
Positive
Negative
Neutral (zero)
This force holds the nucleus together and is stronger than the repulsion of protons.
Gravity
Strong nuclear force
The electromagnetic force
The weak force
How many valence electrons does magnesium (Mg) have?
2
12
24
24.305
What does He represent in the box?
Atomic number
Atomic mass
Element Symbol
What does the number 3 represent in the box?
Atomic Number
Atomic Mass
Which number tells you how many protons an element has?
Atomic Number
Atomic Mass
Isotope Number
What do we call the vertical columns on the periodic table?
Periods
Groups
Elements
Beryllium has an atomic mass of about 9. How many neutrons does Be have?
4
5
9
Which element is a nonmetal?
Ne
Li
Be
K
How many valence electrons does oxygen (O) have?
2
6
8
16
Elements are formed through nuclear fusion and star death
True
False
What color of visible light has the shortest wavelength?
Red
Yellow
Blue/violet
Green
Which of the following is NOT evidence that supports the Big Bang Theory?
Redshift of light
Cosmic microwave background radiation
Hydrogen & helium being the most common elements
Oxygen being the most common element
Which elements are present in the unknown?
Sodium only
Calcium and iron
Magnesium only
Sodium and iron
