7 An atom that has 13 protons and 15 neutrons is an isotope of the element

(1) nickel (3) aluminum

(2) silicon (4) phosphorus

If an atom has an electron configuration of 2.8.3, how many electrons can it involve in bonding? A. 11 B. 3 C. 2 D. 13

Which is true of chemicals? A. Things containing chemicals always cost a lot of money. B. Chemicals are never dangerous. c. Chemicals are in many substances in a home. D. Chemicals are rarely found on Earth.

In a chemical reaction, a reactant binds to an enzyme at a region known as the___. A. Catalyst B. Product C. Substrate D. Active site

An equilibrium mixture contains 0.600 mol of each of the products (carbon dioxide and hydrogen gas) and 0.200 mol of each of the reactants (carbon monoxide and water vapor) in a 1.00-L container.

How could an alpha particle pass straight through the metal foil and strike the center of the phosphor screen on the other side without scattering at all?

Explain why elements and compounds are pure substances

Which term best describes the water in a sugar-water solution?

What are the forces that create electromagnetism?

The nose is an organ that acts as an airway for oxygen to enter the body. The nose also contains hairs that trap small foreign objects and stop them from entering the body. Which two systems does the nose play a role in? A. respiratory and immune B.

HBr + Mg (OH) 2 MgBr2 + H2O