Chemistry Homework.. Please HELP!?

[koltin]

Question 1 1 points Save
Dmitri Mendeleev grouped elements by

color.
orbitals.
atomic mass.
atomic number.
Question 2 1 points Save
The elements that are not chemically active, referred to as Group 18 on the periodic table, are called

the noble gases.
alkali metals.
transition metals.
halogens.
Question 3 1 points Save
The modern periodic law states that the properties of the elements are periodic functions of their atomic numbers.

True
False
Question 4 1 points Save

Who was the Russian chemist who developed the first periodic table?


John Dalton
Dmitri Mendeleev
Henry Moseley
Albert Einstein
Question 5 1 points Save
Why did Mendeleev leave empty spaces on his periodic table?

Because he needed to make the elements fit any way he could.
Because he wanted to exclude certain elements.
Because he died before he finished the table.
Because he believed that elements would be discovered that would fit in those spaces.
Question 6 1 points Save
Moseley grouped the elements according to atomic mass.

True
False
Question 7 1 points Save
The periodic table is an arrangement of elements by atomic numbers, so elements with similar properties will be in the same column.

True
False

[morcan]

all of these are easily answered with a quick google search or shocking your textbook D:

[stein74]

Wow.. keystone students are so lazy, I can't wait for some of you to go to college and flunk out the first day because you have no idea how to do ANYTHING. You didnt even take the time to take the "1 points save"....