Which of these periods contain elements with electrons in s, p, d, and f orbitals? A.
periods 1–3

B.
periods 1–4

C.
periods 3–5

D.
periods 6–7

Chromosome 17 is made of over million base pairs.

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point

Explaining why atoms bondcomplete the sentence. atoms form chemical bonds to satisfy the    rule and to become  .