SCIENCE ( Development of the Periodic Table )

Question 1

he unites the atomic theory with
the concept of chemical elements.

Answer 1

John Dalton

Question 2

He said that if a substance can be
broken down into simpler
substances, then the original
substance cannot be “elemental”.

Answer 2

Antoine Lavoisier

Question 3

first to try
to classify elements

Answer 3

Johann Döbereiner

Question 4

Organized elements into groups of three
called

Answer 4

triads

Question 5

Noted that there was
a repetition of properties every eighth
element when atoms were arranged according
to their atomic masses

Answer 5

John Newland

Question 6

Considered the father of
the modern periodic
table.

Answer 6

Dmitri Mendeleev

Question 7

He derives a relationship between the x-ray
frequency and the number of protons.

Answer 7

Henry Moseley

Question 8

he discovered elements 94
to 102 and reconfigured
the periodic table by
placing the
lanthanide/actinide
series at the bottom of
the table.

Answer 8

Glenn Seaborg

Question 9

horizontal rows

Answer 9

Periods/Series

Question 10

vertical columns

Answer 10

Group/Family

Question 11

Located to the left of the perodic table

Answer 11

Metals

Question 12

Located to the right of the staircase line

Answer 12

Nonmetals

Question 13

Located on and below the staircase line

except At and Al.

Answer 13

Metalloids