Bohr BABY
What are the components of a Bohr diagram?
Nucleus-with protons and neutrons
Energy Shells-with electrons
Who created a model of the atom with electrons moving around the nucleus in fixed orbits?
Niels Bohr
Name the 3 subatomic particles, their charge, and location.
proton, positive, nucleus
neutron, neutral, nucleus
electron, negative, shells
period = horizontal rows
family = vertical columns
How many families and period are there in the periodic table of elements?
7 groups
18 families
What subatomic particle(s) correspond to the atomic number?
protons and electrons
Who did the gold foil experiment and discovered that the proton had a positive charge?
Ernest Rutherford
How many protons, electrons, and neutrons are there in Ba?
56 protons, electrons
81 neutrons
Atoms in the same __________ have similar chemical properties. Why?
Group/family
Same electron configurations in the valence shell.
Name an alkaline earth metal and explain why it is less reactive than an alkali metal?
Be, Mg, Ca
2 valence electrons in outer shell, whereas alkali only have 1
How many electrons can live in each of the first 3 energy shells?
2, 8, 8
Who discovered the electron using the cathode ray?
JJ Thomson
What atom has a mass of 197 amu and 118 neutrons?
gold
Why are He, Ne, Ar, and Kr all considered stable? What is the name of this family and what number?
How many valence electrons are there in the element found in swimming pools?
Chlorine
7 valence electrons
The number of energy shells corresponds to what?
The period number of the element.
Who hypothesized that atoms cannot be destroyed, are always moving, and are indivisible?
Democritus
How many electrons does the atom known for causing "mad hatter disease" have in total?
80 electrons
In what period and group is lead located?
period 6, group 14
How many protons, neutrons, and electrons are there in the element found in your toothpaste?
Flourine
9 protons, 9 electrons, 10 neutrons
How many electrons would be in the valence shell of an iodine atom?
7
Who proposed the basis of our modern periodic table?
Dmitri Mendeleev
How many neutrons and protons are in the element found in bananas?
20 neutrons
19 protons
What period and family is element located that makes up the character who longs for a heart in the Wizard of Ox?
Sn, tin
period 5, group 14