Question

1 multiple choice 1 point
moseley arranged his periodic table in order of increasing...
color.
atomic mass.
atomic number.
size.
2 multiple choice 1 point
atomic number is the number of ______ within an atom’s nucleus.
protons
neutrons
quarks
electrons
3 true or false 1 point
mendeleev, meyer, and moseley’s work in chemistry contributed to the modern periodic table.
true
false

Explanation:

Question 1

Moseley's periodic table arrangement is based on atomic number (the number of protons). Atomic mass was used by Mendeleev, and color/size are not periodic table ordering criteria.

Atomic number is defined as the number of protons in an atom's nucleus. Neutrons are part of atomic mass (mass number), quarks are sub - atomic particles of protons/neutrons, and electrons are outside the nucleus.

Mendeleev and Meyer developed early periodic tables based on atomic mass, and Moseley refined it with atomic number. Their combined work contributed to the modern periodic table.

Answer:

C. atomic number.

Question 2