Which of these substances are molecules?
1.h2o
2.naci
3.n2
4.o2
answer choices
a) 1& 2
b) all of them
c) none of them
d) 3& 4

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.