Cotton a thin membrane like skin dye and a liquid that helps absorb things
UV rays, gamma rays, and x rays
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The reaction releases heat and gives net energy to its surroundings. The energy needed to initiate the reaction is less than the energy released.
Answer:
Ca.
Sb.
Explanation:
a. When comparing the two elements Ca and As , the more metallic element is:__________ based on periodic trends alone.
The correct option is Ca. Ca belongs to group 2 which is more easily give off it's electrons, compared to As which is a group 5 member.
c. When comparing the two elements Sb and Pb , the more metallic element is:___________ based on periodic trends alone.
The correct option here is Pb. Thhs is because ionization energy decreases down the group. Pb has a lower ionization enthalpy than Sb