Question

question 6 (1 point)
the modern periodic table is arranged in order of increasing atomic
o a charge
o b number
o c mass
o d radius
question 7 (1 point)
who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements?
o a antoine lavoisier
o b john dalton
o c henry moseley
o d dmitri mendeleev
question 8 (1 point)
which of the following categories includes the majority of the elements?
o a nonmetals
o b metalloids
o c liquids
o d metals

Explanation:

• Question 6: The modern periodic table is arranged by atomic number. Atomic number is the number of protons in an atom's nucleus and determines an element's identity.
• Question 7: Dmitri Mendeleev arranged elements by atomic mass and predicted properties of missing elements. His work was a significant step in the development of the periodic table.
• Question 8: Metals make up the majority of elements. They are typically good conductors of heat and electricity, malleable, and ductile.

Answer:

• Question 6: B. number
• Question 7: D. Dmitri Mendeleev
• Question 8: D. metals