Answer:
6s
Explanation:
Barium is in group 2 of the s block and is in period 6.
Answer:
Chemical Properties
Explanation:
Chemical properties are properties that are observed during chemical reactions. Some examples of chemical properties are reactivity, flammability and chemical stability.
Answer:
2.11 x 10²⁴ molecules.
Explanation:
- <em>It is known that every 1.0 mole of a molecule contains Avogadro's number of molecules (NA = 6.022 x 10²³).</em>
<em><u>Using cross multiplication:</u></em>
1.0 mole of H₂O contains → 6.022 x 10²³ molecules.
3.5 mole of H₂O contains → ??? molecules.
∴ 3.5 mole of H₂O contain = (3.5 mol)(6.022 x 10²³) = 2.11 x 10²⁴ molecules.
Answer:
the answer is b hope it helped
Explanation:
Mass number = protons + neutrons
mass number = 5 + 7
mass number = 12