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level: The periodic table

Questions and Answers List

level questions: The periodic table

Question	Answer
What does periodic mean	At regular intervals
In what year was the periodic table put in order of mass and by who	1865, by John newlands
What are the vertical columns called	Groups
What are the horizontal columns called	Periods
How many groups are there	8
What era groups 1,2,7 and 8 called	1:alkali metals2:alkaline earth metals7:halogens8:noble gasses
How is the group number related to the elements	The group number is the number of elements in the outer shell of the elements
Group 8 is also called group	0
How many periods are in the periodic table	7
How are the periods usually labelled	n = 1 etc
What does the steps of stairs or the bat line separate	Metals from non metals
What are the elements in the middle of the periodic table called	transition metals/transition elements
In the first atom shell what is the maximum amount of electrons can be in it	2
Elements in group one tend to lose	One electron
Elements in group 2 tend to lose	2 electrons
Elements in group 7 tend to gain	2 electrons
Elements in group 8 tend to gain	1 electron
How do ions work	When they lose an electron they form a positively charged atom because there is 1 more protons then electrons same with electrons but negatively
What is an ionic bond	The force of an attraction between the ions( negative and positive) bonds the ions together(ionic bond) from the electrons moving from one to the other
A compound is when	2 atoms are chemically combined( has to be different element atoms)
A mixture is when	2 atoms of the same elements join together
What is our periodic table in order of	Of increasing atomic number