Answer:
Alkali metals are soft and have low melting points.
Answer:

Explanation:
Hello there!
In this case, according to the described chemical reaction, Cl2 replaces iodine in NaI in order to produce I2 and NaCl:

It is possible to realize how chlorine replaces iodine in agreement with the single displacement reaction. Moreover, since chlorine and iodine atoms are not correctly balanced, we add a 2 in front of both NaI and NaCl in order to do so:

Best regards!
Yes, this is balanced. Each part of the substance (like Mg) has the same number on both sides.
Hope this helps you:)
A metalloid is a metal and a nonmetal