Atomic Structure
An element has 6 protons, 6 neutrons and 6 electrons. What element is defined?
Carbon, due to 6 protons
Which element is more electronegative, F or I?
What is F.
Electronegativity decreases down a group.
Where are metals located on the periodic table?
What is to the left of the metalloid staircase.
Examples; Mg, Na, Zn, Ag
What is the definition of polarity?
A molecule with an uneven distribution of electrons. Has partial positive and partial negative dipoles.
What is a chemical change?
When a new substance is formed.
An element has 17 protons, 20 neutrons and 18 electrons. What is the charge of this ion?
( -1 ) because it has an extra electron.
17 protons vs 18 electrons
What is ionization energy?
What is a covalent compound composed of? Give an example
What is nonmetals?
Examples: H2O, CO2, BF3
The molecule CH4 has this geometry.
What is tetrahedral?
Is water boiling a chemical or physical change?
Physical
What are Magnesium-24 and Magnesium-27 called?
The trend that explains all periodic trends and has to due with the charge of the nucleus and shielding electrons.
What is Effective Nuclear Charge.
The more protons, the more pull on electrons.But the more electron shells (shielding electrons), the less the pull on the outer electrons.
What are ionic compounds composed of? Give an example.
What is a metal + nonmetal/polyatomic ion?
Examples: CaSO4, NaCl, MgF2, LiOH
The intermolecular forces are between H2O molecules?.
What are dispersion, dipole-dipole and hydrogen bonding?
What are the five signs of a chemical reaction?
Fire/Light, Color Change, Odor Change, Gas Formation, and Precipitate Formed.
The molecular mass of CH3OH.
What is 32 amu?
C = 12 amu; H = 1 amu; O = 16 amu
add up all the atoms in the molecule
Which has a larger nucleus, Mg or Si?
What is Mg?
Atomic Radius decreases across a period/row.
What is the name for the compound, Ca(NO3)2
What is calcium nitrate?
Ionic compounds do not use greek prefixes.
Which of the following have only dispersion forces?
CO2, H2S, CH4, CH3Cl, Br2
What are CO2, CH4, Br2
What type of reaction is the following:
Mg(s) + AgNO3(aq) --> Ag(s) + Mg(NO3)3(aq)
What is a single-displacement reaction?
The element with the electron configuration of 1s22s22p63s1
What is Na, sodium?
When an ionic compound is heated, light is emitted. Explain what happens at the nuclear level with protons, neutrons or electrons.
When a metal atom is heated, the electrons absorb the energy and jump to an outer orbital. They emit the energy in the form of light and return to their ground state orbital.
What is the Name and Lewis-Dot Structure of CO2?
Carbon Dioxide.
Lewis-Dot Structure: https://goo.gl/images/kxqJEq
Rank the following molecules from lowest boiling point to highest boiling point:
H2O, CH4, KCl, PF3
CH4 < PF3 < H2O < KCl
dispersion < dipole-dipole < hydrogen bonding < ion-ion
Which compound in the following double-displacement is the precipitate?
Fe(NO3)3 + NaOH --> Fe(OH)3 + NaNO3
What is Fe(OH)3?
Look at the products and read from the solubility chart. Find compound that has the (s) symbol.