Element A has 6 valence electrons. Element B has 7 valence electrons. Both atoms must follow the octet rule. In the Lewis structure of AB2, the number of lone pair electrons on the central atom A is:

What is a metal replacement reaction

What will most likely happen when two bromine atoms bond together?

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)