Atomic Theory
The first Periodic Table of Elements was organized by
What is atomic mass
The three basic categories of elements are
What is metalloids, metals, and non-metals
What scientist discovered the periodic table
What is Dimitri Mendeleev
What is NaCl=Salt
A __________ is the building block of matter
What is an atom
The Periodic Table we use today is organized by
What is the atomic numbers
Elements in the first row below the rest of the periodic table are known as
What is Lanthanides
An atom in group 16 has how many valence electrons
What is 6
The element in Group 16 Period 2
What is Oxygen
An atom becomes negatively charged by
How many valence electrons are in carbon
What is 4
The purpose of the zig zag line is to
What is seperate the metals from the non-metals
what are valence electrons
What is electrons in the outer most shell
The element in Group 14 Period 6
What is Lead
How many neutrons does an atom of Aluminum contain?
What is 14
Most of the volume of an atom is occupied by
What is the electron cloud
The maximum number of electrons the first outer shell can hold is
What is 2
How many groups are in the periodic table
What is 18
The only metal element that is liquid at room temperature
Mercury
An atom has 14 neutrons, 13 protons. What is its mass number?
What is 27
Atoms can join together – they form bonds together to make
What is molecules
Where are the electrons found in an atom
What is orbiting the nucleus/electron cloud
The number of periods in the periodic table are
What is 7
The groups in the periodic table of elements are organized by
What is similar characteristics
These two groups are highly reactive on the periodic table
What is group 1 and group 17/7A