An atom's nucleus has what kind of charge?
A. Negative.
B. Positive.
C. both of these
D. none of the above
Answer: B
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Chemical equations need to be balanced not only in terms of the number of atoms, but also by the charge. In other words, just as there should be the same number of atoms before and after the arrow of an equation, there should be the same charge
What set of coefficients is necessary to balance the following chemical equation? ____ Sn2+ + ____ Ag ? ____ Sn + _____ Ag? A) 1, 2, 1, 2 B) 1, 1, 1, 2 C) 1, 2, 2, 2 D) 1, 1, 2, 1
Some planktonic marine organisms, especially those that live in warm water, have unusual appendages to increase their ________
A) body mass B) hunting skills C) overall size D) sexual attractiveness E) surface area
____________ possess backbones. Fill in the blank(s) with the appropriate word(s)
Natural capital is defined as all of Earth's resources that are necessary to produce ________
A) environmental justice for all B) a profit C) a sustainable market D) the ecosystem services that we depend on E) a safe habitat for endangered species