Which of these elements has two electrons in its outer p orbitals?

helium (He)

barium (Ba)

nitrogen (N)

silicon (Si)

sulfur (S)

What is a star made of?

What is the name of the acid formed by H2SO4

7. Lawrencium has a half-life of 3.00 minutes. I started with a 100.0 g sample. After 45.0 minutes how much of my sample remains Lawrencium?

Definee effective nuclear charge

Which equation is correctly balanced? A) H2 + O2 H2O B) Ca + Cl2 CaCl C) 2 H2 + O2 2 H2O D) Ca + Cl2 Ca2Cl

Which has the highest viscory? Milk? Water? Orange juice?

What was venter's comtributionto science?

How many atoms are in 151 g of calcium?

Which statements about the formation of the solar system are true and in a correct order? A. A black hole collapsed to form the sun; small planetary objects formed; small planetary objects collided with each other to form larger objects. B.

Which is an important step in the alternate method for balancing equations in redox reactions? a) indicating the types of bonds found in the molecules. b) determining the speed at which reactions take place.