What is the number of protons, electons, or neutrons in Oxygen?
100
Lithium has ____ electrons in the first shell and ____ electrons in the second shell.
What is 2 and 1?
100
A group with 1 valence electron.
What is Alkali metals?
100
Vertical columns are called?
What is families or groups?
200
Na
What is Sodium?
200
7
What is the number of protons or electrons in Nitrogen?
200
Phosphorus has _____ shells or orbitals of electrons?
What is 3?
200
A group with two valence electrons.
What is Alkaline earth metals?
200
Horizontals rows are called.
What is periods?
300
Helium
What is the only element to be considered a noble gas with only 2 valence electrons?
300
Sodium has 11 protons and _____ neutrons.
What is 12?
300
The second shell can hold ____ electrons.
What is 8?
300
A group with four valence electrons.
What is carbon family?
300
Stairstep elements found on the right side of the periodic table that have characteristics unlike the rest of the right side are called.
What is Metalloids?
400
Aluminum
What is considered a metalloid and has only 3 valence electrons?
400
Potassium has ______ neutrons?
What is 20?
400
Chlorine has ____ electrons in the 1st shell, ___ electrons in the second shell and ____ electrons in the third shell.
What is 2,8,7?
400
A group with 7 valence electrons.
What is Halogens?
400
Shiny elements that conduct heat and electricity and are found on the left side of the periodic table are called.
What is metals?
500
Si
What is the symbol for Silicon?
500
Hydrogen has ______ neutrons.
What is zero?
500
Calcium has ____ electrons in the first shell, ____ electrons in the second shell, ____ electrons in the third shell, and ___ electrons in the fourth shell.
What is 2,8,8,2?
500
A group with full outer shells.
What is Noble Gases?
500
The two rows of synthetic elements at the bottom of the periodic table are called.