Conceptual Chemistry - Periodic Table

Who first thought of arranging the elements into a table based on their properties?

• Mendeleev

• Moseley

• Bohr

• Ramsay

Who left blanks in his periodic table and predicted the properties for three elements that were not yet discovered?

• Mendeleev

• Moseley

• Ramsay

• Rayleigh

How did Mendeleev indicate undiscovered elements in his periodic table?

• blank spaces

• neon signs

• he didn't

• he searched for them

Who changed the periodic table to be ordered by atomic number?

• Moseley

• Mendeleev

• Ramsay

• Strutt

Element's properties repeat when placed in order of increasing

• atomic mass

• atomic number

• denstiy

• neutron count

Tags

NGSS.HS-PS1-1

The actinides are elements

• 90 to 103

• in group 2

• 58 to 71

• in group 18

The lanthanides are the elements

• in group 18

• 90 to 103

• 58 to 71

• in groups 3 to 12

Which of these elements are noble gases.

• neon

• fluorine

• xenon

• krypton

• oxygen

What states that the physical and chemical properties of elements are periodic functions of their atomic numbers?

• periodic law

• periodic trends

• octet rule

• law of conservation of mass

Elements with similar properties will be found in the same _______________ of the periodic table.

• row

• diagonal

• region

• column