WorksheetsPhy Sci, Monday Bell Ringer, 10/29/18
Total questions: 9
Worksheet time: 7mins
Name
Class
Date
1.
Who first had the idea of the atom?
a)
Democritus
b)
Dalton
c)
Rutherford
d)
Thompson
2.
Who first had evidence of the atom?
a)
Democritus
b)
Dalton
c)
Rutherford
d)
Thompson
3.
Who discovered the electron?
a)
Bohr
b)
Dalton
c)
Rutherford
d)
Thompson
4.
In Bohr's model electrons are....
a)
...dispersed in a positive soup
b)
...evenly spaced around the nucleus
c)
...found at different energy levels
d)
...found in clouds surrounding the nucleus
5.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
6.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
7.
The central region of an atom where neutrons and protons are located is the __________________.
a)
nucleus
b)
electron cloud
c)
core
d)
center
8.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
9.
Matter always has mass.
a)
true
b)
false
100 %
