Periodic Table
Who is the first person to organize the class elements based on their properties?
Mendeleev is the first person to organize the elements based on their properties.
What do elements in the same column have similar?
Elements in the same column have similar chemical and physical properties.
What are the 3 forms of bonding?
Ionic; Covalent; Metallic
What does VSEPR stand for?
Valance Shell Electron Pair Repulsion
What group is the most reactive metal group?
Alkali metals are the most reactive metal group.
State at least three different trends?
1. Atomic Radius & Ionic Radius
2. Ionization Energy
3. Electronegativity
4. Reactivity
5. Metallic Character
State at least 3 per properties of ionic compounds?
1. Crystals
2. High melting and boiling points
3. Dissolve in water
4. Conduct electricity only when melted or dissolved
State at least three molecular geometries?
1. Linear
2. Bent
3. Trigonal Planar
4. Tetrahedral
5. Trigonal Pyramidal
Group 2 is the second most reactive metal group and they are called the Alkali Earth Metals
What is atomic radius?
Atoms radius is the size of an atom meaning the du sat me from nucleus to outermost electrons.
What are metallic bonds?
Metallic bonds hold metal atoms together very strongly.
How is polarity determined?
Polarity is determined by the symmetry of the molecule and by the electronegativity difference of bonds.
State 3 characteristics of metals:
shiny; conduct heat & electricity; malleable
What is an ion?
An ion is an atom that gains an electron and becomes negative.
How are metallic bonds formed?
They are formed between atoms of the same metallic elements.
What is a tetrahedral and what its bond angle?
A tetrahedral has 4 atoms attached to center atoms and its bond angle is 109.5°
Which group has the most reactive non-metals and what are they called?
Group 17 are the most reenact i’ve non-metals and are called Halogens.
What is electronegativity?
Electronegativity is how much an atom wants to gain an electron.
What are covalent bonds?
A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
What is a polar molecule?
A polar molecule is a molecule in which one end is slightly positive, while the other end is slightly negative.