The chemical formula of calcium trioxocarbonate(iv) is
The atomic number of magnesium is
In Long form of periodic table; the groups are numbered
Which chemical equation is balanced among the following?
branch of chemistry deals with the study of natural products from plants and animals
What is the mass number of an element with 6 protons and 6 neutrons
The change of gas to solid is called
..........was the first scientist that constructed the periodic table?
Elements in the periodic table,that have the same number of electrons in its outermost shell are in the same?
Nitrogen is in group.......
In the periodic table,Elements that have the same number of shells are in the same........
Natural source of clean water that contains vital minerals is
An atom that is positively charged is called
The abbreviation used to represent chemical reactions is called
Elements known to be electron donors are called
The following are non metals except
