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.
I think the family of Group 2 metals are most likely to form a 2+ion.
Answer:
color
Explanation:
Scientists can use the color of minerals to tell them apart.
Answer: the arrangement of electrons around the nucleus of an atom with lower energy levels.
Explanation:
Answer:
True
Explanation:
All the chemical elements have their abbreviations as one or two letters
The first letter in the abbreviation is a capital letter and the second letter is always a small letter
Majority of abbreviations are based on their english names
