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An atom with 3 valence electrons will most likely ________
 
lose three electrons.
 
gain three electrons.
 
gain five electrons.
 
lost five electrons.
What is the formula of a compound formed by the ions M^2+ and X^3-?
 
M3X2
 
M2X3
 
MX3
 
M2X
For the isotope 71Ga, Z = __ and A =__.
 
31; 71
 
31; 40
 
71; 40
 
71; 31
The smallest amount of an element that retains that element's characteristics is the _____
 
atom.
 
electron.
 
molecule.
 
proton.
Another name for atomic mass unit (amu) is the _______
 
dalton.
 
avogadro.
 
mendeleev.
 
kekule.
How many calories are released when 500 g of water cools from 95.0°C to 25.0°C?
 
3.50 × 10^4 cal
 
1.25 × 10^4 cal
 
70.0 cal
 
4.75 × 10^4 cal
What temperature is -10°C on the Fahrenheit scale?
 
14°F
 
-18°F
 
263°F
 
26°F
Which choice best describes the degree of uncertainty in the measurement 4.0032 g?
 
The measurement is between 4.0031 and 4.0033 g.
 
The quantity is exact.
 
The measurement is between 3.99 and 4.01 g.
 
The measurement is between 4.002 and 4.004 g.


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