Peaceful Protest, Signing Pettitons, contacting mayors/governors and writing emails/sending letters
Answer:
mass and energy is reused when those things happen
Answer:
Down Syndrome- is when you have an extra 21st chromosome.
Turner Syndrome- is when one of the x chromosome is missing or partly there.
Explanation:
There are many more and you can find a complete list online.
The atomic mass on the periodic table represents the sum of number of protons and number of neutrons.
Atomic mass = Number of protons + number of neutrons
Hope this helps!
Option 2, Br. I'll go over why all other three options are incorrect.
Option 1 - Krypton is a Noble gas, and so it doesn't need to accept electrons since it has an octet.
Option 3 and 4 - Both Calcium and Barium are alkaline earth metals, and give away electrons, since they only have 2.
-T.B.
