A. all magnets have two poles
Answer:
Electron bonds break and reattach to other atoms
Explanation:
Most chemical reactions involve the breaking of bonds
Answer:
See below
Explanation:
Temperature is basically a measure of the average kinetic energy of the particles in the sample ....so as temp goes up, kinetic energy increases
Answer:
False
Explanation:
Magnesium is the element of second group and third period. The electronic configuration of magnesium is - 2, 8, 2 or
There are 2 valence electrons of magnesium.
Only the valence electrons are shown by dots in the Lewis structure.
As, stated above, there are only two valence electrons of magnesium, so in the Lewis structure, two dots are made around the magnesium symbol.
Given that the electronic configuration is:-
.
Orbital s cannot accommodate 3 electrons and also in magnesium it has
. Hence, the statement is false.
Molar Mass is the mass of a given substance, referring to the Atomic Weight of elements. Therefore, the Molar Mass of Iron (Fe) would be 55.845 gmol-1