by Andrew Baldwin
Students will be able to explain how the atomic structure of isotopes are similar and different from one another.
Niels Bohr added _______________ to the model of the atom.
Which of the following is the best description of J.J. Thomson's model of the atom?
a featureless, indivisible sphere
a sphere of positive material with electrons embedded in it
mostly empty space with electrons randomly orbiting around a positive nucleus
mostly empty space with electrons located in set orbits around a positive nucleus.
Who proposed the following model for the atom?
"Atoms are solid spheres. Each element is made of a different type of atom."
How many protons are in a Chlorine atom? (Mass number = 35)
How many neutrons are in a Phosphorus atom? (Mass Number = 31)
Note: This is not reflective of the Periodic table Organization.
Mass Number provided at the top and atomic number sometimes at the bottom.
The only change should be the top number.
Sometimes it is given in Hyphen notation.
Element symbol or name hyphen (dash) Mass Number.
In a correctly written symbol what would be located in the "A" position?
number of neutrons
number of electrons
What quantities vary between isotopes of an element?
protons, electrons, and atomic mass
protons, electrons, and atomic number
neutrons and electrons
neutrons and atomic mass
What do these isotopes of carbon all have in common?
neutrons & mass number
atomic number and neutrons
atomic number and electrons
protons, atomic number, and mass number
How many protons does this isotope of titanium have?
Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.
n0 ; atomic #’s
p+ ; atomic #’s
e- ; atomic masses
n0 ; atomic masses
If X is the symbol for an element, which of the following two symbols represent isotopes of the same element?
I and II
III and IV
I and IV
I and III
Back to Canvas and Complete Counting Particles Level 2