Answer:
D displacement
Explanation:
This is because removing metal means your displacing it
Sorry but I only know a few
17- decomposers
18- decomposition
21- 10% is lost so 90%
Answer: If the outermost shell has 1–4 electrons, it is a metal.
If the outermost shell has 5–7 electrons, it is a non-metal.
Some benefits are that DDT helps us grow crops and keeps pests off our crops.
But DDT is harmful to the environment. If it gets into the water ways then if can harm fish and animals that eat the fish such as birds.
Answer:
Atoms He (Avogadro’s number) → Moles of He (molar mass of He) → Mass of He
• molar mass of He (from the periodic table) = 4.003 g/mol
• Avogadro’s Number: Avogadro’s number gives us the number of entities present in 1 mole: 6.022 × 1023 He atoms in 1 mole of He
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