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IGCSE Chemistry Atomic Structure Questions and Answers 100% Verified
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IGCSE Chemistry Atomic Structure
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IGCSE Chemistry Atomic StructureWhat do atoms consist of? - answer Atoms consist of a central nucleus, composed of
protons and neutrons, surrounded by electrons, orbiting in shells.
What charge do neutrons have? - answer0
What relative mass do neutrons have? - answer1
What charge do protons have? - answer+1
What relative mass do protons have? - answer1
What relative charge do electrons have? - answer-1
What relative mass do electrons have? - answer1/2000
What is the atomic number? - answer The number of protons in the nucleus of an atom
of an element.
What is the mass number? - answerThe number of protons and neutrons in the nucleus
of an atom of an element.
What is an isotope? - answerIsotopes are atoms with the same number of protons but
different numbers of neutrons.
What is the relative atomic mass? - answerThe relative atomic mass of an element is
the weighted average mass of the isotopes of the element. It is measured on a scale on
which a carbon-12 atom has a mass of exactly 12 units.
How is the Ar calculated? - answerThe relative atomic mass is calculated from the
masses and relative abundances of all the isotopes of a particular element.
How are elements arranged in the periodic table? - answerThe periodic table is an
arrangement of elements in order of atomic number.
How can the number of elements in a main group element be deduced from its position
in the periodic table? - answerThe number of electrons in the outermost shell is the
same as the group number for the element in the periodic table.
What is the threshold for the first electron shell? - answerThe first shell can take up to 2
electrons.
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