The hydrogen one because who doesnt like snoballs'
B 2
is which shell are the valence electrons of the elements in period 2 found
Answer:
Muscles work in pairs to move a bone.
Skeletal muscles only PULL in one direction. For this reason they always come in pairs. When one muscle in a pair contracts, to bend a joint for example, its counterpart then contracts and pulls in the opposite direction to straighten the joint out again.
Answer:
no
Explanation:
Small marble chips reacts faster
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