Which is an example of a chemical change

a.) a candle burns

b.) a pan of water boils

c.) a teaspoon of salt dissolves

d.) a burner gets red hot

If this atom has a balanced charge, how many protons would you expect to find in this atom? 0 2 4 6

Which one of the following represents an acceptable set of quantum numbers for an electron in an atom? (arranged as n, 1, m, and ms) A) 3, 2, - 2, - 1/2 B) 3, 3,-4, 1/2 C) 3,2,0,0 D) 3,3,3, - 1/2 E) 3, 4, 6, - 1/2 A-2

Which is a diatomic molecule? Select one: a. CH4 b. H2O c. O2 d. N

Which of the following atoms are isotopes? 22Na 22Ne 22Na 22Mg 24Na

How are the sizes of stars measured? I just need a simple answer

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.

To identify an unfamiliar organism, you could use a field guide and an

What is the value of Kw at 25°C? 1.0 x 10-14 1.0 x 10-7 1 7 14

Which statement best describes a bacterial cell? A It contains more than one cell. B It is a complete organism. C It is part of a larger organism. D It contains different kinds of cells

Lithium (Li) and oxygen (O) are both in period 2. They both have? a. similar properties b. the same number of protons c. two electron shells d. the same number of electrons