Answer:
true
Explanation:
The lighter a gas is, the faster it will effuse; the heavier a gas is, the slower it will effuse. Of all the choices, helium (He) has the lowest molecular weight (atomic weight in this case), so it will have the highest rate of effusion.
Answer:
The energy required to start a reaction is called the ACTIVATION ENERGY.
Explanation:
Enzymes are proteins that function as biological catalysts to speed up the rate of chemical reactions in cell without being changed into a different molecule.
Answer:
The red blood cell is made to transport oxygen around the body.
Explanation:
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Answer:
Statement B "Elements at the right side of the period are smaller in size" is not true.
Explanation:
Going through the rows of the elements in the period the size of the elements get continuously bigger.
