Answer:
Sorry I’m not rlly sure but maybe the 2nd or the last
Explanation:
A sodium ion symbol is written as Na^+.
"It is important to balance chemical equations because there must be an equal number of atoms on both sides of the equation to follow the Law of the Conservation of Mass"
Hello There!
When the ice melts, the water level will drop slightly but not much.
REMEMBER Ice expands so when ice melts, it shrinks back to the state of being liquid.
Answer: nS²
Answer: According to the periodic law, elements that fall into the same group have similar properties.
All the alkaline earth metals are in group two of the periodic table. The have 2 electrons in their outermost shell. In the SPDF electronic configuration the ground state of all alkaline earth have S² two electrons in their outermost S sublevel.
Example the electronic configuration of some alkaline earth metals are
Beryllium [He] 2S²
Magnesium is [Ne] 3S² and
Calcium is [Ar] 4S²
the general electronic configuration for alkaline earth metals is nS²