Electronic Configuration
Order the following from smallest to highest ionization energy. Se Co Ca Kr K
K < Ca < Co < Se < Kr
smallest highest
What is the Octet rule
The octet rule refers to the tendency of atoms to prefer to have eight electrons in the valence shell. When atoms have fewer than eight electrons, they tend to react and form more stable compounds. When discussing the octet rule, we do not consider d or f electrons.
In which compound does chlorine have an oxidation number of +3?
A) HClO B) HClO2 C) HClO3 D) HClO4
B
Which of the following elements is not likely to form either negative or positive ions because its highest energy level already has a stable octet?
K Zn He Xe Sc
Xe
From 1862 to 1927, the FDA incorporated what scientific study of the properties and behavior of matter into its name? This “C” word can also be used to describe how people get along.
Chemistry
Order the following from smallest to largest radius. S Ar Mg Al P
Ar < S < P < Al < Al
smallest largest
What is Lattice Energy?
Lattice energy is the energy required to separate 1 mol of an ionic solid into gaseous ions. Lattice energy is a measure of the strength of the ionic bond.
What are the trends of Atomic Radius, Electron Affinity and Ionization Energy from across the period and down the group
Atomic Radius:
Across a Period (Left to Right): Atomic radius generally decreases across a period.
Down a Group (Top to Bottom): Atomic radius generally increases down a group.
Electron Affinity and Ionization Energy:
Increases across the period
Decreases down the group
In the modern periodic table elements are arranged in order of increasing?
a. Atomic Number b. atomic mass
c. valence electrons d. electronegativity
Atomic Number
The property of a wave that is associated with brightness or intensity is ________.
Amplitude
Write the full electronic configuration and the condensed electron configuration for the following:
Fe^2+
Cu+
Fe^2+=1s2 2s2 2p6 3s2 3p6 3d6 or (Ar) 3d6
Cu+= 1s2 2s2 2p6 3s2 3p6 3d10 or (Ar) 3d10
What are some properties of Ionic Compounds?
• Ionic compounds tend to be hard, rigid, and brittle, with high melting points.
• White crystalline solids
• Ionic compounds do not conduct electricity in the solid state.
– In the solid state, the ions are fixed in place in the lattice and do not move.
• Ionic compounds conduct electricity when melted or dissolved.
– In the liquid state or in solution, the ions are free to move and carry a current.
Indicate if the following are paramagnetic or diamagnetic.
Li
Paramagnetic
For an electron in a given atom, the larger n, the
A) smaller the average distance from the nucleus and the higher the orbital energy.
B) larger the average distance from the nucleus and the lower the orbital energy.
C) larger the average distance from the nucleus and the higher the orbital energy.
D) smaller the average distance from the nucleus and the lower the orbital energy.
C
What is the capital of Germany?
Berlin
Write the electron configuration for Ga^+3
(Ar)
What is Ionization Energy?
The amount of energy required to remove the highest-energy electron from an isolated neutral atom in the gaseous state
Indicate if the following are paramagnetic or diamagnetic.
Ca
Diamagnetic
In a representation of an orbital, a region having zero probability of finding an electron is called a ________
Node
What are the possible value of l if n= 5?
0, 1, 2, 3, or 4
Which has the highest electron affinity? Which has the lowest?
S O Se
O has the highest and Se has the lowest electron affinity
What is Electron Affinity?
The energy change that occurs when an electron is added to an isolated atom in the gaseous state
Indicate if the following are paramagnetic or diamagnetic.
Mg2+
Diamagentic
Among the following options, which bond has the highest bond dissociation energy? A) O=O B) C-H C) C(Triple bond)C D) C-C"
C
One of the nucleoside bases of DNA, what does the "A" in ATP -- one of the most important molecules in biochemistry -- stand for?
Adenosine