Modern Periodic Table Flashcards
What did Mendeleev do?
He predicted unknown elements and what their properties.
On the periodic table, what does the atomic number tell us?
It tells us the amount of protons
On the periodic table, what does the mass number tell us?
The number of protons and neutrons
On the periodic table, what is another name for the rows?
Periods
On the periodic table, what is another name for the columns?
Groups
Why do elements in each group have simmilar chemical properties?
They have the same number of electrons in their outermost shell.
What does the group number tell you?
It tells you how many electrons are in the outer shell
What are group one called?
Alkali metals
Going down group one do the elements become more or less reactive?
More reactive
What is group 7 called?
Halogens
Going down group 7 did the elements become more or less reactive?
Less reactive
What is another name for group 0?
Noble gases
Are the noble gases reactive or unreactive?
Very unreactive
What does the name the element in the middle of the metals?
Transition metals
