An atom nucleus contains 28 protons and the atom has a mass number of 60. how many neutrons does this atom contain? how many electrons? what is the identity of the atom?

Van der waals interactions result when hybrid orbitals overlap. a hydrogen atom loses an electron. molecules held by ionic bonds react with water. two polar covalent bonds react. electrons are not symmetrically distributed in a molecule.

What is a short definition of force?

Based on their chemical formulas, which of these common substances is an element? A. Bleach (NaClo) B. Silver (Ag) C. Quartz (SIO2) D. Marble (CaCO3)

Balance the equation: Fe↓2O↓3 ⇒Fe↓3O↓4 + CO↓2

What has formed as a result of hotspots? A. The Mid-Atlantic Ridge B. Mount St. Helens C. The San Andres Fault D. The Hawaiin Islands

Should a bartender use ice and scoop directly from ice machine or use an ice holding device and scoop to make drinks and refill drinks from

What classification should this reaction have? 4Al + 3O2 → 2Al2O3

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?