CHEMISTRY PLEASE HELP! An atom's electron configuration ends with 3p3. If another atom has nine more electrons, what would be the continuation of the electron configuration?

3p64s23d4
3p34s23d7
3p63d44s2
3p33d74s2

The characteristics of two different types of reactions are shown below:

Reaction A: Protons are gained or lost by the atom of an element.
Reaction B: Electrons are lost by the atoms of an element.

Which statement is true about the two reactions?

Valence electrons are not involved in both Reaction A and Reaction B.
Valence electrons are involved in Reaction B but not in Reaction A.
Valence electrons are involved in both Reaction A and Reaction B.
Valence electrons are involved in Reaction A but not in Reaction B.

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas. in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?