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

barium (Ba)

nitrogen (N)

silicon (Si)

sulfur (S)

Water seeps into cracks in a rock, expands on freezing, and enlarges the cracks in a process called A. exfoliation B. Hydrolysis C. Frost Wedging D. Frost heaving

A lemon with mass 0.3 kg falls out of a tree from a height of 1.8 how much mechanical energy does the lemon have just before it hits the ground? (assume there is no air resistance)

At equilibrium, no chemical reactions take place. true or false

Across a period, how does the electronegativity of a nonmetal affect the acidity of its binary hydride

Which of these is a diatomic molecule? A) H2 B) Ne C) H2o D) CuF2

The universe contains billions of galaxies, each containing billions of stars. True or false

How is measuring the volume of liquids different than measuring the volume of regular-shaped solids?

Which of the following best describes the motion of the particles in a piece of steel?

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table