Periodic Table
Na is the symbol for what element?
Sodium
What is the element with 17 protons?
Chlorine
Fluorine has how many electrons in its valence shell?
7
Which groups are most reactive?
1 and 7
Which group is least reactive?
The noble gases, group 8
Ca is the symbol for what element?
Calcium
The halogens
What is the name of element number 1?
Hydrogen
Which group (name) of elements are least reactive?
The noble gases
Which is more reactive, Sodium or Argon?
Sodium
Metals are found in the _ hand side of the periodic table.
Name the element from the Alkali Metals from this group:
Cesium, Bronine, Copper
Cesium
What element has the symbol Xe?
Xenon
Lose or share the valence electron
Which is the group of elements that need to gain one more electron to be stable?
The halogens
Name the element between Oxygen and Neon
Fluorine
What group has all of its valence shell filled up?
The noble gases
What element has 17 electrons?
Chlorine
The atomic mass of this element is 32.065 u and the number of neutrons is: 16. What element is this?
Sulfur
Which is more reactive, Potassium or Gold?
Potassium
Who invented the Periodic Table?
Russian scientist: Mendeleev
Group 8 is also known for another number - which group number?
0
What element's symbol is K?
Potassium
Which element has an atomic mass of 30.9 u?
Phosophorus
What does the term 'valence electrons' mean? (2 things)
number of electrons on outermost shell, tells how reactive an element is