Answer:
Hydrogen.
Explanation:
We see in the nucleus that we have 1 proton and 1 neutron.
The number of protons in the nucleus determines which element it is.
Element with 1 proton is the 1st element on the Periodic Table, Hydrogen.
Answer:
B.
Explanation:
Increased stability in fluoride ion.
greater the particles move on average because as the higher the temperature the more energy the particles have to the more they move .
Answer:
d = 2.27 cm3
Explanation:
m = 125 g
V = 55 cm3
m = V × d
=> d = m/V = 125/55 = 2.27 g/cm3
Answer:
Neon consisted of atoms of two different masses but chemically alike. ... Movement of electrons between energy levels in atom must absurb just a certain amount energy to move to higher level can't hover between levels.
