An atom in the ground state has two electrons in its first shell and six electrons in its second shell. What is the total number of protons in the nucleus of this atom? (1) 5 (2) 2 (3) 7 (4) 8

What is the structure of a krypton85 atom

Pat pours cold, liquid cream into a cup of hot coffee. Which of the following describes how the hot coffee and cold cream will interact? A) The cold cream will drop to the bottom of the cup. When it warms, some of it will rise back to the surface.

Which best describes a molecule? O a unit made of different kinds of elements a unit made of only one kind of element a unit made of two or more atoms a unit made of a single atom O O

What is the molar mass of CaI2?

Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars every day.

Not all of the water falls as rain, snow, or sleet evaporates. What happens to the rest of the water?

58.5 million excess electrons are inside a closed surface. What is the net electric flux through the surface?.

Nitrogen monoxide and oxygen, both colorless gases, form a red-brown gas when mixed. Nitrogen monoxide and oxygen are called the

What quantity of heat is needed to raise the temperature of 5.0g of a substance from 20 c to 30 c if the specific heat?

Compare mechanical energy and thermal energy.