Scientists
Periodic
Elements
Periodic
Elements
Periodic Elements
100
Moseley organized elements by their____________________ and ________________.
Atomic number, and number of protons
100
Periodic means ______________________________.
Happening at regular intervals.
100
______________ is the only element on the left side of the periodic table that is a gas.
Hydrogen
100
Which group contains metals, non-metals, metalloids, solids at room temperature and has four electrons in its outer shell?
Carbon group
200
Mendeleev organized elements by their _________________.
Atomic mass
200
____________________ was one of the elements that Mendeleev predicted.
Germanium
200
Thallium exists most commonly in what state?
Solid
200
Which group contains only gases?
Noble gases
300
Mendeleev’s periodic table is arranged in _____________ and _____________.
periods and groups
300
What do mercury and bromine have in common?
They are both liquids at room temperature.
300
What group is very reactive, contains only metals and has one electron in its outer shell?
Alkali metals
300
Iron is to the right of manganese. Manganese has an atomic number of 25 and an atomic mass of 54.9 how many protons does iron have?
26
400
Who was the scientist that diagramed an atom?
Bohr
400
Boron, silicon, germanium, arsenic, antimony, and tellurium are all ____________.
Metalloids
400
What group contains only metals, has two electrons in its outer shell and is very reactive, but less reactive than some groups?
Alkaline-earth metals
400
Tin is directly below germanium on the PT. Germanium has an atomic number of 32 and a atomic mass of 72.6. How many electrons does tin have?
50
500
Who came up with a way to heat things in order to preserve them? His name is mentioned in the process and he is French.
Louis Pasteur
500
What do all elements to the far right of the Periodic Table have in common, which is why they are called the noble?
Gases
500
Which group contains more than one group, is spread across the largest region of the PT and contains only metal
Transition metals
500
Helium has an atomic number of 2 and an atomic mass of 4. How many neutrons does it have?
2
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