Mendeleev made an early periodic table. In the modern periodic table, elements are arranged in order of atomic number in periods and groups. Electronic arrangements model how electrons are arranged.
In what order did Mendeleev arrange the elements in his periodic table?
Relative atomic mass
In what order is the modern periodic table arranged?
What name is given to a vertical column in the periodic table?
Where are non-metals found in the periodic table?
In the middle
On the left
On the right
What is the electron arrangement of oxygen which has atomic number 16?
In what group is an atom with electron arrangement 2.8.1?
What is an unusual physical property of a group 1 metal?
High melting point
What is the word equation for the reaction of sodium with water?
sodium + water → sodium hydroxide + hydrogen
sodium + water → sodium hydroxide
sodium + water → hydrogen
What colour are chlorine, bromine and iodine when they are in the gas state?
Chlorine is yellow-green, bromine is green and iodine is purple
Chlorine is yellow-green, bromine is red-brown and iodine is purple
Chlorine is yellow-green, bromine is red-brown and iodine is grey
Which salt will bromine water react with?