The Atoms
What number tells you the number of protons and electrons?
Atomic Number
The vertical columns on the periodic table.
Groups or families
Radioactive elements found in the bottom of the periodic table are called this
Actinides
Name the element found in group 5 period 5
Niobium
I have 8 protons and you can't live without me. What am I?
Oxygen
The sum of these two particles tells the atomic mass of an element.
Protons and Neutrons
The horizontal rows on the periodic table
Periods
Tell the number and name of the group that contains the most reactive metals.
Group 1, the Alkali metals
What element has 17 electrons?
Chlorine
You can find me spinning around the nucleus in the outer most shell of an atom. What am I?
The valence electrons
Protons have a ___________ charge.
Positive
The number found at the top of an element square that identifies the element.
The atomic number
The metals used for jewelry are found in this group.
Group 3-12- Transition metals
What element's symbol is K?
Potassium
You can find us along the zig-zag line on the periodic table. What are we?
Metalloids
This particle is found in the nucleus of an atom and has no charge.
Neutron
The number on the element square that tells the sum of protons and neutrons in the nucleus of the atom.
The atomic mass number
Tell the number and name of the group on the periodic table that contains the least reactive elements.
Group 18, The Nobel Gases
What element is a gas with 22 neutrons?
Argon
What are the most reactive group of nonmetals?
The Halogens, group 17
What does the term 'valence electrons' mean?
number of electrons on outermost shell, tells how reactive an element is
What are the three categories of elements on the periodic table?
Metals, Non-metals, and Mettaloids
What is significant about the elements in a group?
The elements in a group have similar chemical properties
With an atomic mass of 39 and 20 neutrons in my nucleus, I am a very reactive metal.
Potassium
This chemical found in salt reacts explosively with water to create hydrogen gas, an orange flame, and a hydroxide
Sodium