# 6 - Mendeleev & Moseley, Atomic Structure, Atomic Theory

Page 69: (a)   developed the original periodic table. ​ (b)   developed the modern periodic table that we use today.

Page 70: Mendeleev made his periodic table before scientists knew about the structure of the ​ (c)   . He didn't know that the atoms of each element​ have a unique number of ​ (d)   that gives the atom its ​ (e)   .

• Albert Einstein

• Dmitri Mendeleev
• Isaac Newton

• Henry Moseley
• protons
• unique identity
• electrons
• neutrons
• atom
• unique mass

Page 66: Use your periodic table to place these elements into the correct category:

Groups:

(a) Metals

,

(b) Nonmetals

,

(c) Metalloids

• Chlorine - Cl

• Antimony - Sb

• Aluminum - Al

• Germanium - Ge

• Phosphorus - P

• Carbon - C

• Krypton - Kr

• Iron - Fe

• Arsenic - As

• Silicon - Si

• Calcium - Ca

• Sodium - Na

Tags

NGSS.MS-PS1-1

Page 69: Match the following:

• don't use

• Mendeleev arranged his periodic table by:

• Atomic Number

• Moseley arranged his periodic table by:

• atomic mass

• don't use

Page 67: Place these properties into the correct categories:

Groups:

(a) Metals

,

(b) Nonmetals

,

(c) Metalloids

• good conductors

• brittle, hard and somewhat reactive

• poor conductors

• high melting point

• look like metals, behave like nonmetals

• lustrous (shiny)

• somewhat electrically conductive

• malleable & ductile

• nonductile, nonmalleable

• ability to form metal alloys

• low melting point

• dull (not shiny)

Tags

NGSS.HS-PS1-1

Page71: Mendeleev left empty spaces in his periodic table and predicted that ​ (a)   . Moseley grouped elements into vertical columns based on ​ (b)   . Mendeleev was unaware of the ​ (c)   due to their ​ (d)   with other elements.

• they would remain empty
• they would be filled with gases
• new elements would be found to fill them
• similar properties
• similar valence electrons
• similar energy rings
• noble gases
• halogens
• inability to react
• extreme reactiveness

Page 71: Match spots A, B, C, & D with the element name that Mendeleev left a space for. Write your predictions on page 71.

(HINT: Use your periodic table!!)

• Sc

• D

• Ga

• C

• Ge

• A

• Tc

• B

Tags

NGSS.HS-PS1-1

Page 71: Match spots E, F, G, & H with the element name that Mendeleev left a space for. Write your predictions on page 71.

(HINT: Use your periodic table!!)

• Hf

• G

• Re

• H

• At

• F

• Po

• E

Tags

NGSS.HS-PS1-1

Page 53: Identify the parts of the atom model.

a

b

c

d

e

Neutron

Electron Shell

Proton

Nucleus

Electron

Tags

NGSS.MS-PS1-1

Page 63: Match the scientist to their model of the atom:

• Thomson

• 
• Schrodinger

• 
• Dalton

• 
• Bohr

• 
• Rutherford

• 

Tags

NGSS.MS-PS1-1

Page 52: Match the part of the atom to its responsibility or location:

• protons & neutrons live here

• protons

• responsible for the charge of an atom

• energy rings

• responsible for the mass of an atom

• protons & neutrons

• responsible for the identity of an atom

• nucleus

• electrons live here

• protons & electrons