Answer:
The Nazi occupation of Czechoslovakia in March 1939, cause war because it defied the Munich agreement and ended Britain's appeasement policy. The Nazi-Soviet Pact (29th August 1939) caused war because it sealed Poland's downfall.
Explanation:
Two electrons.
Yes, calcium is defined as a metal because of both its physical and chemical traits. They all have an outer shell with two electrons and are very reactive. Those elements in the second column have two electrons ready to make compounds. It shouldn't surprise you that calcium has a valence of 2.
<span>The correct way to write 602,200,000,000,000,000,000,000 in scientific notation is 6.202 x 10^23. In the scientific notation, the number is written as a multiplication of a number from 1 to 9 and 10 raised to the adequate power. 602,200,000,000,000,000,000,000 = 6.202 x 100,000,000,000,000,000,000,000. Since 10 = 10^1; 100 = 10^2; 1,000 = 10^3, etc. then 100,000,000,000,000,000,000,000 = 10^23. Therefore, 602,200,000,000,000,000,000,000 = 6.202 x 100,000,000,000,000,000,000,000 = 6.202 x 10^23.</span>
