Use the following electron configuration to answer the question. 1s2, 2s2, 2p6, 3s2, 3p6, 4s2
How many valence electrons are in this atom?
O2
20
O 1
O 8

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Can someone me with 6 to 10 plz this is for masteries test.

7. in the cycle, a virus integrates its dna into the host's dna, and its dna is replicated when the host dna is replicated. a. infectious b. retroviral c. lysogenic d.lytic