Atomic theory
The name of the first atomic model that democritus thought up.
ATOMOS
This alkali metal is one of the elements found in table salt.
sodium (Na)
Which group on the periodic table is completely stable and unreactive?
noble gases
How many energy levels, does Beryllium (atomic number 4 ) have?
2
sodium
Na
What did the gold foil experiment discover?
nucleus/protons
This alkaline earth metal will help your bones grow strong.
Calcium (Ca)
This group is extremely reactive and some of the elements in this group will explode in water
alkali metals
Which of these elements has the lowest electronegativity, iron, francium, flourine?
flourine (f)
Silver
Ag
Which scientist used the catode ray experiment to learn more about electrons
J.J Thompson
This transition metal is used in steel and will rust when exposed to oxygen.
iron (Fe)
Which group has two electrons in its valence shell?
alkaline earth metals
which of these metals is the heaviest, sodium, calcium, uranium?
uranium (U)
Gold
Au
What is the name of the most current atomic model?
Electron cloud model.
This element is a post transition metal commonly used in the body of airplanes and cars
aluminum (Al)
This group elements used to make semiconductors like silicon and germanium
metalloids
If an element has an atomic number of 30 and a mass number of 100, how many protons does the element have?
30
Potassium
K
What was the name of Dalton's model?
Billiard ball model
This element is used as the filament inside many lightbulbs
tungsten (W)
The group contains chlorine and flourine and other toxic gases
Halogens
This element is commonly used for fireworks.
Strontium (Sr)
lead
Pb