The second period of the periodic table is composed of ______________ (how many?) elements.
Fill in the blank(s) with correct word
[Ques. 2] When an earthquake occurs, the point of initial energy release is called the earthquake's ______________.
a. epicenter
b. fault line
c. focus
d. none of the above
[Ques. 3] Elements have similar chemical properties because they have the same number of electrons in their ______________.
Fill in the blank(s) with correct word
[Ques. 4] When an earthquake occurs, the location on Earth's surface above the point of initial energy release is called the earthquake's
a. fault line.
b. focus.
c. epicenter.
d. none of the above.
[Ques. 5] The amount of energy necessary to remove an electron from an atom is called that atom's ______________.
Fill in the blank(s) with correct word
[Ques. 6] After a major earthquake, the rocks may continue to adjust to their new positions, causing additional vibrations called
a. aftershocks.
b. reverberations.
c. echoes.
d. none of the above.
[Ques. 7] The major credit for the development of the periodic table goes to a scientist named ______________.
Fill in the blank(s) with correct word
[Ques. 8] The radius of Earth is about __________ mi.
a. 6000
b. 8000
c. 4000
d. 2000
[Ques. 9] An element that tends to gain or share electrons during chemical reactions is classified as a(n) ______________.
Fill in the blank(s) with correct word
[Ques. 10] Large fractures in Earth's surface that are associated with the movement of lithospheric plates are called ______________.
a. canyons
b. trenches
c. subduction zones
d. faults
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