Basic Facts of the Periodic Table
How many different columns that have different properties are there?
There are 18 different columns
MASS: The amount of matter in any object
True
what are groups?
They are the columns on the periodic table
What is matter?
Its anything that takes up space and makes up everything in the universe.
when was he born?
8 February 1834
How many elements are there on the periodic table?
118 confirmed elements
The Periodic Table is made up of false elements
False
What are Valence electrons?
They are Chemical properties are largely based on the outer most electrons
What are elements?
Any substance that cannot be broken down into simpler stable substances by chemical means.
How many siblings did he have?
16 brothers and sisters ; the exact number is uncertain
Who came up with the Periodic Table?
Dmitri Mendeleev
There are 120 elements known to man right now
False; 118
what does having metallic properties do?
it is an element that has 1, 2, or 3 valence electrons. Which, will give up electrons easily.
What an atomic structure made up of?
electrons, neutrons, and protons
How old was he when his father died?
He was 13
How many metals are there on the periodic table?
There are 91 elements that are metals
There are two types of characteristics that can distinguish matter; They are Physical properties and Chemical properties
True
What do nonmetals do?
An element that has 4, 5, 6, or 7 electrons. Which, will gain electrons easily
What is the electron cloud?
It is a space where the electrons move around which is found in the nucleus. It's attracted to the nucleus because of its negative charge.
When did he start studying at school?
At age 16
What's the difference between how the Periodic Table is arranged now and how it used to be?
The modern periodic table ordered the elements by increasing of the atomic number. While Dmitri Mendeleev's was ordered by increasing of the atomic weight.
Elements always occur alone.
False
What are groups with 8 electrons considered to be
Groups that have 8 electrons are said to be stable
What do Isopotes have?
Has the same protons but a different number of neutrons.
How did he figure out that the Periodic Table was missing elements?
He wrote the elements out on notecards and tried to find a pattern but couldn't so he moved the cards around trying to find out what it was. He fell asleep on his desk while doing this and when he woke up his mind did the work for him. When he had fell asleep he had a dream about how they were laid out.