What does the subscript 2 show in this chemical equation? h2o → 2h o

a. there are 2 oxygen atoms.

b. there are 2 hydrogen atoms.

c. there is half of a hydrogen atom.

d. there are 2 water molecules.

In a chemical reaction where does the energy gets stored

An atom has the following electron configuration. 1s22s22p63s23p64s23d3 How many valence electrons does this atom have? A. 2 B. 3 C. 5 D. 11

What is Green Chemistry?

Which of the following best describes what happens when an ionic bond forms? A) two atoms come together and share electrons in order to fill their octets. B) two atoms give up their electrons in order to form a bond.

Thulium-167 has a half life of 9.0 days. If the initial amount of thulium is 50.0 grams. How many grams are left after 36.0 days?

Which subatomic particle identifies an atom as that of a particular element? how is this particle related to the atoms atomic number

Which of the following prefixes means seven

Which of the solutions below is a weak electrolyte? nacl (aq) koh (aq) hcl (aq) h2so3 (aq) all of these?

What is the gram formula mass of Ca (OH) 2

How much heat is absorbed by a 37g iron skillet when its temperature rises from 8oC to 24oC?