Very reactive group 1 metals with only one valence electron in their outer shell
What are alkali metals?
100
A chemical bond that occurs when one atom "steals" electrons from another atom, causing the charged atoms to then stick together
What is an ionic bond?
100
When drawing Lewis structures, most atoms need ____ electrons to be stable (unless they are hydrogen, boron, or another exception!)
What is 8 electrons?
100
Which kind of molecule has partial negative and positive charges that cause it to be attracted to other molecules - and make it harder to break molecules apart - polar or nonpolar
What is a polar molecule?
200
Nonreactive elements that have a stable octet of eight electrons in their valence shell
What are noble gases?
200
A chemical bond where electrons are shared unequally; causes the molecular to have partial negative and positive parts
What is polar covalent bond?
200
How many valence electrons does the molecule PCl3 have? What is its molecular geometry?
What is 26 electrons and trigonal pyramidal?
200
C-H bonds are always considered ___________
What is nonpolar?
300
Explain the periodic law in your own words
What is the properties of elements change in a regular pattern as you go across a period or down a group
300
Which compound has a higher boiling point - ionic or covalent? Explain why.
What is ionic compounds - because they have a crystal lattice made of oppositely-charged ions that stick together strongly; in contrast, covalent molecules are held together by weak intermolecular forces
300
1) What does VSEPR stand for?
2) Explain VSEPR theory in your own words.
What is valence-shell electron-pair repulsion?
What is the valence electrons in atoms that are bonded to each other repel each other and try to get as far away from each other as possible - this determines the shape of the molecule.
300
The strongest kind of dipole-dipole force, represented by OH bonds
What is hydrogen bonding?
400
How does electronegativity change as you go across a period from left to right. Explain why.
What is electronegativity increases because the positive charge of the nucleus increases (more protons) and pulls electrons in closer?
400
Why do most atoms want to bond?
What is atoms want to decrease their potential energy and become stable?
400
Draw the Lewis structure for the polyatomic ion: [ClO2]-
What shape is it?
What is...
What is bent?
400
the type of intermolecular force that is temporarily caused when polar molecules get close to large nonpolar molecules or when electrons randomly end up on the same side of the atom
What is induced dipole/ London dispersion forces?
500
How does atomic radius change as you go down a group. Explain why.
What is the atomic radius increases because more energy levels are added, and the electrons get farther away from the nucleus - causing the atom to get bigger?
500
Explain why metals are malleable
What is metals have a sea of electrons that is free to move, so when the metal is pounded with a hammer, the electrons shift without breaking. The bond is the same in all directions, unlike ionic compounds.
500
Draw the Lewis structure for N2O5.
What shape(s) is/are represented in the structure?
What is ...
What is two trigonal planar shapes?
500
Why is CCl4 nonpolar?
What is the shape of the molecule is tetrahedral, so all of the polar bonds cancel each other out, and the overall molecule is nonpolar