CHEMISTRY PAPER 1: REVISION QUESTIONS AND CORRECT VERIFIED ANSWERS

What is an element? - Ans .A substance that contains only one type of atom Atom - Ans .Smallest particle of an element Isotope - Ans .each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element. What substances are found in the periodic table? - Ans .Elements Where are the metals found in the periodic table? - Ans .Left hand side What is the symbol for oxygen? - Ans .O What is the symbol for sodium? - Ans .Na Where are substances found with similar properties? - Ans .In the same group What subatomic particles are in the nucleus in an atom? - Ans .Protons and neutrons What subatomic particle goes around the nucleus in an atom? - Ans .Electrons What is the charge on a proton? - Ans .+1 What is the charge on a neutron? - Ans .0 What is the charge on an electron? - Ans .-1 Do atoms have a charge, why? - Ans .No because the number of positive protons equal the number if negative electrons A carbon atom has 6 protons how many electrons will it have? - Ans .6 What order are the elements in the modern periodic table?