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level: Level 1

Questions and Answers List

Question	Answer
How many electrons can go in the first shell	2
how many electrons can go in the second shell	8
what are groups in the periodic table	the columns numbered 1, 2, 3, 4, 5, 6, 7, 0
what can the group tell you about the electrons in an atom	how many electrons are in the outer shell
what are periods in the periodic table	the rows in the periodic table
what can the period tell you about the electrons in an atom	how many shells the atom has
why did Mendeleev put some elements in groups	because they had similar chemical properties
why did Mendeleev leave gaps in the periodic table	for elements that have not been discovered yet
what is an ion	an atom that has lost or gained an electron
how many electrons does calcium have	20
how many electrons does silicon have	14
how are the electrons in sulphur arranged	2.8.6
how are the electrons in magnesium arranged	2.8.2
how many electrons are in the outer shell of boron	3
how many electrons are in the outer shell of phosphorous	5
how many electrons are in the outer shell of sodium	1
an element has three shells and three electrons in the outer shell what element is it	aluminium
how many electrons are in the outer shell of gallium	3
1	1
1	1