Unit 2 textb flashcards
2APR25
What is the best description of Ionic bonding?
Electrostatic attraction between oppositely charged ions
What is the formula for the compound formed by aluminium and sulfur?
Al2s3
What happens when lithium reacts with bromine?
Lithium will loose and electron and bromine will gain
Which of the following are Ionic compounds?
a. NH4CL
b. NH4NO3
c. HCL
NH4CL and NH4NO3
Name Cr2O3
Chromium (III) oxide
Name BaSO4
Barium sulfate
What increases in equal steps of one from left to right in the periodic table for the elements sodium to argon?
Number of electrons
What elements are metalloids?
Boron, Silicon, Germanium, Arsenic, Antimony, and tellurium
Electron config of P: 1s^2 2s^2 2p^6 3s^2 3p^3
Relate it to its place on the periodic table.
- It’s principle energy is 3 meaning its in period three
- Has 3p^3 config meaning its in group 3 of the P block (group five)
- Has 3s^2 3p^3 meaning it has 5 valence electrons (Group 15)
What property is used to arrange the elements in the modern periodic table table?
Atomic number
Which pair would react together most vigorously?
a. Li and Cl2
b. Li and Br2
c. K and Cl2
d. K and Br2
K and Cl2
Which properties of period 3 elements increase from sodium to argon?
Nuclear charge and electronegativity
Which physical properties decrease with increasing atomic number for both alkali metals and halogens?
a. Atomic radius
b. Ionization energy
c. Melting point
Ionization energy
Which property decreases down group 7 in the periodic table?
electronegativity
Which factors lead to an element having a low value of first ionization energy?
Large atomic radius and high number of occupied energy levels
What is correct about the trend of electronegativity?
Metals usually have lower electronegativity then non-metals
Which compound of an element in period 3 reacts with water to form a solution with a pH greater than 7?
Na2O
When Na, K, and Mg are arranged in increasing atomic radius what is the correct order?
Mg, Na, K
How does a lithium atom form the most stable ion?
The atom loses an electron to form a positive ion.
Which compound contains both ionic and covalent bonds?
A. CH3COONa
B. CH3COOH
C. K2O
D. CaCl2
CH3COONa
What are properties of gaseous atoms?
Electron affinity and ionization energies
What is the name of the compound with formula Cr2(CO3)3?
Chromium (III) Carbonate
Why is hydrated copper (II) sulfate blue?
B/c light complimentary to blue is absorbed when electrons are promoted between d-Orbitals
What is the oxidation state of oxygen in H2O2?
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