Electric force is an

A. attraction and repulsion between protons and electrons

. B. attraction and repulsion between protons and neutrons.

C. attraction and repulsion between neutrons and electrons.

What criteria must be met for a collision to result in particles changing?

You have 4.872 x 1034 atoms of Copper. How many moles is this? 7.666 x 10^32 mol 2.933 x 10^58 mol 1.237 mol 8.093 x 10^10 mol

Am231 has a half-life of 432.2 years. it is used smoke detectors in household detectors. The smoke detector in your home has this radioactive product in it. Why do we use radioactive Am231 in our homes?

An ion is formed when an atom gains or loses

Small beads of iridium-192 are sealed in a plastic tube and inserted through a needle into breast tumors. If an Ir-192 sample has an initial activity of 560 dpm, how much time is required for the activity to drop to 35 dpm (t1/2 = 74 days) ?

What does the cell theory state? A. that cells come from other cells B. that cells come only from animals C. that cells cannot be created or destroyed

For which one of the following molecules is the indicated type of hybridization not appropriate for M the central atom? a. BeCl2 sp2 b. SiH4 sp3 c. BF3 sp2 d. C2H2 sp e. H2O sp3

P4O10 (s) = - 3110 kJ/mol H2O (l) = - 286 kJ/mol H3PO4 (s) = - 1279 kJ/mol Calculate the change in enthalpy for the following process: P4O10 (s) + 6H2O (l) → 4H3PO4 (s)

Aluminum bromide reacts with chlorine gas to produce aluminum chloride and liquid bromide, according to the chemical equation below: 2A1Br3 + 3Cl2 + 2AlCl3 + 3Br2 How many moles of Aluminum chloride are made if 779 g of chlorine gas are consumed?

When a cell is in late anaphase of mitosis, which of the following will we see?