5)
(a) Using the symbol of the previous noble gas to indicate the
core electrons, write...
5)
(a) Using the symbol of the previous noble gas to indicate the
core electrons, write the electronic configurations of atoms in the
following elements: (i) Al (ii) Se (iii) P
(b) How many valence electrons are there in each of the above
atoms?
(c) When the above elements form an ion, what charge is each of
them likely to have?
(d) Using the noble gas notation, write the electronic
configurations of the ions formed in part (c).
Q1: What is the definition of isotopes?
A: Two elements that have same number of electrons,...
Q1: What is the definition of isotopes?
A: Two elements that have same number of electrons, protons
and neutrons B: Two elements that have different number of
electrons C: Two elements that have identical number of protons,
but different number of neutrons D: Three elements that have
identical number of protons
Q2: Which compound has the highest boiling point in this
series?
A: Water B: Ethylene C: Caron Tetrachloride D: Ethyl
Alcohol
Q3: What is the definition of mole of...
Ammonium acetate, NH4C2H3O2 is frequently used to create a
buffer in solutions. Two moles of this...
Ammonium acetate, NH4C2H3O2 is frequently used to create a
buffer in solutions. Two moles of this compound contains:
A. 5 mole of oxygen.
B. 12 moles of hydrogen.
C. 14 moles of hydrogen.
D. 3 moles of carbon.
Which is true about Ba2+ and I- ?
A. They have the same number of neutrons
B. they have the same number of protons
C. they have the same number of electrons
D. they belong to the same group
E. none of...
Give the name, give the symbol, or given the symbol, give the
name for the following...
Give the name, give the symbol, or given the symbol, give the
name for the following elements: Period 1, Period 2, Period 3, From
Period 4: K, Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, Br, From period 5: Ag,
Sn, I, From period 6: W, Au, Pb, From period 7: U
3. Identify elements by group number and period number.
4. Identify the alkali metals, alkaline earth metals, halogens,
and noble gases.
5. Identify an element as a metal,...
3)
a) for an atom with the atomic number 37 and mass number 85,
provide the...
3)
a) for an atom with the atomic number 37 and mass number 85,
provide the number of electrons,protons, and neutrons
b) which atom in each group has the highest first ionization
energy?
-. Na AL Ga
- F CL Cs
C) based on position in the periodic table, predict the most stable
ion for each of the following atoms
-Sr
-P
D) which atom or ion that is isoelectronic with AR: F-.
Cl-. Kr. Na+
E) which...