The small part in the center of the atom is called a nucleus
Answer:B
Explanation:
Atoms and molecules are always moving or vibrating. (just took the test)
Answer:
When electrons move from a higher energy level to a lower one, photons are emitted, and an emission line can be seen in the spectrum. Absorption lines are seen when electrons absorb photons and move to higher energy levels. ... An atom in its lowest energy level is in the ground state.
Answer:
See below.
Explanation:
They both have 1 valency electron so will be metallic and in the same Group (Group 1) of the Periodic Table, so will have similar properties.
