Periodic Table
An arrangement of the elements by increasing atomic number and by changes in physical and chemical properties
What is the periodic table
What is the atomic number?
particle with an electrical charge of 1-
What is an electron?
The number of valence electrons group 15 has
5 Electrons
A carbon atom with 6 protons, 6 electrons and 6 neutrons would have a mass number of?
12
The vertical column of elements on the periodic table
the sum of the number of protons and the number of neutrons in an atom
What is the mass number?
the small, positively charged center of the atom
What is the nucleus?
This category of elements can act like a metal and a nonmetal
What is a metalloid?
This element is in group 1 but isn't an alkali metal
What is Hydrogen?
The horizontal rows on the periodic table
What is a period
atoms of the same element that have different numbers of neutrons
What are isotopes?
particle with no charge
What is a neutron?
Elements in the same group have (2 answers)
Similar chemical/physical properties, and the same number of valence electrons
Chlorine has atomic number 17 and mass number 35. How many neutrons are in it's nucleus?
18 neutrons
The two elements on the periodic table are liquids at room temperature
What is Mercury and Bromine
You can further break protons and neutrons down into these parts
What are quarks?
An atom with more electrons than protons
What is an anion?
These horizontal rows tells you what energy level an element has
What is a Period
The number of valence electrons Helium has
What is 2
One of the first people to arrange the elements into a table based on their increasing atomic mass
Who is Mendeleev
the weighted average mass of the mixture of isotopes of an element
Average atomic mass
An atom that has more protons than electrons
What is a cation?
another name for a group (column) of elements on the periodic table
families
How many atoms in the molecule (C9 H8O4)2?
42