Why do lithium (Li) and sodium (Na) have similar properties?

A. They are in the same period.

B. They are in the same group.

C. They have the same number of electron shells.

D. There names both end with "ium"

Two of the main dangers for the icebreaker ship Polarstern during their year-long stay in the frozen Arctic ocean are 1) the ship being crushed by the frozen ice and 2) polar bears. True False

Write the total ionic equation for the reaction of hydrofluoric acid with potassium hydroxide. 1. koh (aq) hf (aq) → kf (s) h2o (ℓ) 2. k (aq) oh - (aq) hf (aq) → k (aq) f - (aq) h2o (ℓ) 3. koh (s) h (aq) f - (aq) → k (aq) f - (aq) h2o (ℓ) 4.

The pOH of a solution is

A restaurant is trying to decide whether it should serve its customers coffee in ceramic mugs or Styrofoam cups.

What is the mole ratio of oxygen to carbon dioxide in the following equation? C3H8 + 5O2 3CO2 + 4H2O A) 2:2 B) 3:5 C) 5:3 D) 10:6

In what ways are polyatomic ions like simple ions

How does oxygen obey the octet rule when reacting to form compounds? A) It gains electrons. B) It gives up electrons. C) It does not change its number of electrons. D) Oxygen does not obey the octet rule.

Which equation obeys the law of conservation of mass? A. 2Fe+3O2 - -> 2Fe2O3 B. 4Fe+O2--> 2Fe2O3 C. Fe+O2--> Fe2O2 D. 4Fe+3O2--> 2Fe2O3

Why do airbags fill evenly with gases?

In which of the following reactions will Kc = Kp? In which of the following reactions will Kc = Kp? (A) SO3 (g) + NO (g) ↔ SO2 (g) + NO2 (g) (B) 2 N2 (g) + O2 (g) ↔ 2 N2O (g) (C) 4 NH3 (g) + 3 O2 (g) ↔ 2 N2 (g) + 6 H2O (g) (D) 2 SO2 (g) + O2 (g) ↔ 2