Vocabulary
The smallest unit of an element that retains the properties of that element
An atom
An element with the general electron configuration for its outermost electrons of ns^2 np^1 would be in which element group?
Group 13
Noble gases are generally
Unreactive
How many atoms are there in 122 grams of Pb (lead)?
A) 5 atoms Pb B) 2.3e^5 atoms PB C) 10.053 atoms Pb D) 3.55e^23 atoms Pb
D) 3.55e^23 atoms Pb
What causes hydrogen bonding?
Bonding of a covalently bonded hydrogen atom with an unshared electron pair
Highly reactive metallic elements that react with water to form alkaline solutions are called
alkali metals
The electron configurations of main-group elements en in
s and p orbitals
Which of the following is an example of a nonmetal?
A) Copper B) Phosphorus C) Mercury D) Cadmium
B) Phosphorus
How many grams are there in 4.23e^-5 atoms of C (carbon)?
A) 15.2 g C B) 34.254 g C C) 8.44e^-28 g C D) IDK
C) 8.44e^-28 g C
Homogeneous mixtures are also called
The physical and chemical properties of the elements are functions of their atomic number
Periodic Law
The energy required to remove an electron from an atom is called the atom's
ionization energy
The alkali metal elements are found in Group ___ of the periodic table
Group 1
What is the molar mass of glucose (C6H1206)?
180.16 g/mol
Which state of matter is composed of atoms that have lost many of their electrons?
Plasma
Research that is carried out for the sake of increasing knowledge
Basic research
The electron configuration below represents a ground-state atom of which element?
1s^2 2s^2 2p^6 3s^2 3p^4
Sulfur
Which property is not a characteristic of a metal?
A) Conductivity B) Brittleness C) Luster D) Ductility
B) Brittleness
What is the frequency of a photon whose energy is 3.4e^-19 J?
A) 8.8e^26 Hx B) 5.1e^14 Hx C) 1.9e^-15 Hz D) 2.3e^-52 Hz
B) 5.1e^14 Hz
A dense region of positive charge existed somewhere in the atom
A measure of the ability of an atoms in a chemical compound to attract electrons is called
Electronegativity
The highest occupied energy level in an atom of strontium in its ground state
n=5
Which of the following elements behaves similarly to calcium?
A) Magnesium B) Sodium C) Sulfur D) Chlorine
A) Magnesium
The microwaves used to heat food have a wavelength of 0.980m. What is the energy of one photon of the microwave radiation?
A) 2.03e^-25 J B)2.60e^-25 J C) 3.23e^-24 J D) IDK
A) 2.03e^-25 J
As electrons add to s and p sublevels in the same main energy level, they are pulled closer to the more highly charged nucleus, causing
Atomic radii to decrease in size