Atomic History
This scientist generated the Atomic Theory?
Dalton
Where the protons & neutrons are located in an atom.
nucleus
Electronegativity increase as you move ____ & to the _____ on the periodic table.
up ; right
What is an isotope?
Atoms with the same number of protons, but a different number of neutrons.
How are ions used in everyday life?
multiple answers
This scientist used a cathode ray tube in his experiment which eventually lead to the discovery of the electron.
Thomson
The location of the electrons in the atom
electron cloud or energy shells/levels
Ionization energy increase as you move ____ & to the _____ on the periodic table.
up ; right
O - 10
How many protons are in this isotope of oxygen?
How many neutrons are in this isotope of oxygen?
8 ; 2
What elements on the periodic table will produce a positive charge?
metals
The scientist who used the gold foil experiment which lead to the discovery of the nucleus and the subatomic particle the proton.
Rutherford
What number is located at the top of each element's box on the periodic table & what subatomic particle does this number represent?
atomic number ; number of protons
Atomic radius increases as you move ____ & to the _____ on the periodic table.
down ; left
Na - 25
How many protons are in this isotope of sodium?
How many neutrons are in this isotope of sodium?
11 ; 14
What elements on the periodic table will produce a negative charge?
nonmetals
The word atom comes from the greek word ______ & is defined as _________. This greek philosopher is credited with coining this term for the atom.
atomos ; indivisible ; Democritus
What number is located at the bottom of each element's box on the periodic table & what subatomic particle(s) does this number represent?
protons & neutrons
Why are elements in the same group/family similar in chemical reactivity?
They contain the same number of valence electrons.
Explain the difference between the average atomic mass & the mass number.
avg atomic mass - an average of all of the mass numbers for all of the isotopes for that element.
mass number - the number of all of the protons and neutrons in an isotope of an element
Determine the resulting ion charge for an ion of calcium when it bonds to oxygen.
+2
State the 3 parts of the atomic theory.
- All substances made of atoms & they are the smallest units of matter.
- All atoms of the same element are alike & have the same mass.
- Atoms join together to form compounds.
Which element is the most reactive in group 1A, alkali earth metals?
Which element is the most reactive in group 7A, halogens?
Francium (Fr) ; Fluorine (F)
How can isotopes be used in science?