How many valence electrons are there in silicon, which has an atomic number of 14?

a. 2

b. 4

c. 6

d. 8

Which planet do scientists believe prevented the asteroids in the asteroid belt from forming a planet? Earth Jupiter Mars Neptune

What is the molecular formula of the simplest alkane capable of having constitutional isomers?

Multiple questions: 1. What does the theory of continental drift explain? A: the breakup up of Pangaea B: the formation of the Circle of Fire C: the break up Selena Gomez and Justin Bieber D: the formation of the earth's layers 2.

The particles of a suspension are dissolved into the solvent. a. True b. False

Which pair contains an incorrect formula. A) aluminum phosphate AlPO4 B) iron (II) sulfite FeSO3 C) silver carbonate AgCO3 D) magnesium hydroxide Mg (OH) 2

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