Atomic Numbers and Electron Configurations Answers

Which of the following did Antoine Lavoisier correctly characterize as an element?

Developed the law of octaves: LavoisierDobereiner✔ NewlandsMendeleevMoseley

Arranged elements by atomic number: LavoisierDobereinerNewlandsMendeleev✔ Moseley

: K

tin:

yttrium:

: Yb

Use the periodic table to identify the name or atomic number for each element below. (Give the name, not the chemical symbol, for each element.)hafnium: atomic number

: atomic number 15

: atomic number 45

osmium: atomic number

magnesium: atomic number

Which of the following did Antoine Lavoisier incorrectly characterize as matter?

Why did Mendeleev leave blank spaces in his version of the periodic table?

Organized elements into four groups based on properties: ✔ LavoisierDobereinerNewlandsMendeleevMoseley

Identified triads of elements with similar properties:

From the list below, choose which groups are part of the periodic table.

Use the periodic table to identify the chemical symbol or name for each element below.zirconium:

Which of these elements are you least likely to find in nature as a pure element (that is, not combined with any other elements in a compound)? Use the periodic table to answer the question.

Rb: