……………classified elements into metals and non-metals
Ohm
Mendel
Berzelius
Watson
Which is the correct symbol of Magnesium ion (12Mg)
Mg+
Mg-
Mg-2
Mg+2
Elements with complete outermost level are…………
Metals
Non-metals
Nobel gases
Elements than can be exist as solid, liquid and gas are………………
A bond that always give compounds is……………
Pole bond
Metallic bond
Ionic bond
Covalent bond
Non-metals have……………..in the outermost level
8 electrons
Less than 4 electrons
Exactly 4 electrons
More than 4 electrons
bond in Oxygen molecule (O2) is…………..
A bond in sodium chloride is………
Which of the following is correct about metals?
Metals gain electrons
All metal are solids
Metals can’t be used in making electric wires
Metals have no luster
An atom that lost or gained an electron or more during chemical reaction is called……………
Nobel
Non-metal
Metal
Ion
A bond resulting from precipitation of electrons is ………
Which of the following is correct about the bond between nitrogen molecule (7N)
Single covalent bond
Triple covalent bond
Double covalent bond
All non-metals are bad conductor of electricity except…………
Bromine
Sulfur
Carbon
Iodine
All the following are solid non-metals except…………
bromine
An atom that lost an electron or more during chemical reaction is called………
Normal atom
Negative ion
Positive ion