Periodic 1
How many elements are there?
There are 118 elements
Who invented the table of elements?
Dmitri Mendeleev
The rows on the table of elements are called?
Periods
The formula for finding neutrons of an atom
Atomic Mass (A)- Atomic Number (Z)
What element has 18 neutrons?
Chlorine (Cl)
Columns on the periodic table are called?
Groups
The three classes of elements are
Metals, Metalloids, Non-metals
Subatomic particle with a negative charge
How many protons and electrons does Arsenic(As) have?
33
Which elements is on period 6, group 6?
Tungsten (W)
Elements that will have same properties will have the same _____ on the periodic table.
(Group or Period)
Group
What is the maximum number of electrons that can accommodate in a N shell?
32 electrons
Describe the relationship between protons and the atomic number.
They are the same number.
The most abundant element on the earth´s crust
Oxygen
He, Ne, Ar, Kr, Xe, Rn are group into what kind of gases?
Noble gases
This compound is used to flavor food.
Salt or NaCl
Isotopes
Substances that are composed of one kind of atom. They cannot be broken down into simpler types of matter by either physical or chemical means.
Elements
Boron (B), Silicon (Si), Germanium (Ge), Antimony (Sb), Tellerium (Te) are elements into a group called _______
Metalloids
Provide the electron configuration of Argon (Ar)
1s2 2s2 2p6 3s2 3p6.
What were the two criteria used by Mendeleev in creating his Periodic Table?
1. Elements are arranged in increasing order of their Atomic mass
2. Similarity of chemical properties
There are 18 of these.
18 groups or families
The four most abundant elements in the human body.
hydrogen, oxygen, carbon and nitrogen
The location of electrons on an atom
Outside the nucleus.