Periodic table
Which group has 2 valence electrons
Group 2
Chlorine gains an electron
Cl-
The number of dots around Sodium?
1
the combination of chemical symbols and possibly numbers
Chemical formula
When an electron is attracted to the nuclei of two atoms at the same time
Covalent bond
The number of electrons in the lowest energy level
2 electrons
The attraction between a positive ion and a negative ion
Ionic bond
The number of dots around Stontium?
2
the total number of atoms in a molecule of carbon dioxide
3
The type of bond between 2 nitrogen atoms
Triple bond
Group that has a full outter shell
A pure substance containing two or more elements
Compound
the number of dots around helium
2
the number of atoms of hydrogen in hydrogen gas
2
The particle formed when atoms share electrons
Molecule
Who made periodic table
Mendeleev
A hard, crystalline compound composed of positive metal ions and negative non-metal ions
Ionic salt
The dot diagram for tin
Sn/4 dots
The chemical formula for 2 atoms of carbon and 4 atoms of hydrogen
C2H4
the overall charge of a particle that is covalently bonded
Neutral
the number of electrons in bromine's outer shell
7 electrons
Sodium loses an electron
Na+
Number of dots around silicon
4
The number of atoms of hydrogen in ammonia
3
When a atom shares two electrons with another atom
Double bond