Ill say <span>calcium hydroxide but hope this helps :)</span>
The answer is , C. Both the atomic mass and the atomic number increase from left to right .
Answer:
Are you in flvs, if so im prettyb sure if yo look on page 3 of lesson 1.04 it tells you the answer.
Explanation:
ELECTRON CONFIGURATION
Highest occupied energy level of an element
equal to the period
for example, the highest occupied energy level of He is 1, Be is 2, Al is 3, Ca is 4, and Sn is 5
The correct answer would be D: Physical properties can be observed without changing the identity of a substance
