QUIZ 2 (CH 2 + SOME CH 1)
What is the charge of a mercury nucleus?
+80
What statements of Dalton's atomic theory have proven to be partially incorrect? [Give all answers] -All matter consists of atoms -An atom cannot be converted into another type of atom -Atoms of a given element are identical -Atoms of different elements can combine to form compounds.
-An atom cannot be converted into another type of atom -Atoms of a given element are identical
Which is true concerning the term "representative elements"? Give all answers -All the elements on the periodic table except the lanthanides are representative elements -All the elements in groups 1A to 8A are representative elements -There are both metals and non-metal in the representative elements -For representative elements, the number of the group is equal to the valence electrons
-For representative elements, the number of the group is equal to the valence electrons -There are both metals and non-metal in the representative elements -All the elements in groups 1A to 8A are representative elements
Which of the following is always a whole number?
-atomic number -mass number
Which group of the periodic table is NOT named correctly? (Give all answers) -"B" groups = active metals -7A = halogens -8A = noble gases -bottom of 3A to 7A = transition metals
-b groups = active metals -bottom of 3A to 7A = transition metals
Which of the following are true concerning Na+1? (Give all answers) -It is called sodium metal -It is called sodium ion -It is neutral -It is very chemically reactive -It is safe to eat
-it is safe to eat -it is called sodium ion
How does the isotope deuterium differ from an ordinary hydrogen atom? [GIVE ALL ANSWERS] -mass -atomic number -number of neutrons -number of protons
-mass -number of neutrons
What is the charge of a zinc atom?
0
What is the sum (in meters) of 0.056 m + 22.1 cm + 22.1 mm?
0.299 m
What is the mass of a neutron?
1 amu
What volume (in mL) will 2.00 grams of air occupy if the density is 1.29 g/L?
1.55 x 10^3 mL
What is the maximum number of electrons allowed in a 5d subenergy level?
10
How many neutrons in an atom of gold with a mass # of 197?
118
How many electrons in an atom with a mass number of 31 and atomic number of 15?
15
What is the isotope symbol of an atom with 15 protons and 17 neutrons?
15 P^32
What is the total mass of three samples: 104.45 g + 0.838 g + 46 g?
151 g
What Celsius temperature is equal to 64.0 F?
17.8
Which group or groups are called the "active metals"
1A and 2A
What is the maximum number of electrons allowed in an orbital in a 4p sublevel?
2
If the density of carbon tetrachloride is 1.59 g/mL, what is the volume in liters of 4.21 x 10^3 grams of carbon tetrachloride?
2.65 L
How many electrons in an atom with a mass number of 88 and an atomic number of 38?
38
What is the sum of 4.11 x 10^12 mg + 4.11 x 10^14 mg?
4.15 x 10^14 mg
How many neutrons in an atom of Arsenic-75?
42
How many protons in the nucleus of a silver atom?
47
If one atom of carbon has a mass of 14.0 atomic mass units and one amu is equal to 1.66 x 10^-24 grams, what is the mass of 25 atoms of carbon (in grams)?
5.81 x 10^-22 grams
What is the maximum number of electrons allowed in a "p" subenergy level?
6
The element copper has only two isotopes Cu-63 and Cu-65. Which is the most abundant? NOT A MEMORY QUESTION
63
The element lithium has only two isotopes: Li-6 and Li-7. Which is the most abundant? NOT A MEMORY QUESTION
7
How many total electrons in a mercury +2 ion
78
What is the maximum number of electrons allowed in the last energy level of an atom? (except if it is n=1)
8
What is the maximum number of electrons in the 2nd energy level?
8
What is the sum of 8.1 x 10-10 + 8.1 x 10-9
8.9 x 10^-9
How many protons in the nucleus of a lead atom?
82
How would you describe something with atomic number 12, mass number 25 and only 10 electrons?
Mg^+2 ion
What is the chemical symbol of the atom with a mass number of 79 which has 45 neutrons?
Se
Which statement concerning atoms is FALSE? -The atomic number of an atom is the number of protons it contains -The mass number of an atom is the sum of the number of protons, neutrons and electrons it contains -The nucleus of an atom contains its protons and neutrons -The nucleus of an atom is always positively charged -The nucleus of an atom is the heaviest part of an atom
The mass number of an atom is the sum of the number of protons, neutrons and electrons it contains
Which is the highest energy? -infrared -radio waves -UV radiation -visible -microwaves
UV radiation
Tungsten is a metal containing 74 protons and usually 110 neutrons. It is used in the electronics industry. What is the chemical symbol for Tungsten? NOT A MEMORY QUESTION
W
When is an atom in its ground state?
When the electrons of the atom are in the lowest possible energy levels
In modern atomic theory, Bohr orbits are replace by atomic orbitals. What is an atomic orbital?
a region in space within atom where there is a high probability of finding an electron
What is the mass of an electron?
almost compared to the mass of a proton
Which is the highest energy? -yellow -green -orange -blue
blue light
In what type of change does an atom become an ion
chemical change
How many neutrons in potassium atom?
depends upon which isotope of potassium
What is the relationship between "X" and "Y" if the number of neutrons are the same, but the number of protons differ?
different elements
All atoms of an element have the same mass number
false
All the electrons in the third energy level have the same amount of energy
false
The nucleus of an atom contains neutrons, protons and electrons
false
What is the relationship between "X" and "Y" if the number of protons are the same, but the number of neutrons differ?
isotopes
Which is the lowest energy? -infrared -x-rays -ultraviolet -visible -microwaves
microwaves
In what type of change does an atom of one element become an atom of a different element
nuclear change
What is the relationship between "X" and "Y" if the number of protons and neutrons are the same, but the number of electrons differ?
one is an ion
The identity of an atom is determined by which of the following?
the number of protons it contains
All atoms of an element have the same number of protons
true
An atom with 7 electrons in the outermost energy level will want to gain one electron in a chemical reaction
true
Certain isotopes of some elements are radioactive
true
Electrons and protons have the same charge but opposite sign
true
Metals want to lose electrons in a chemical reaction
true
Neutrons have no charge
true
The atomic mass of an elements is the weighted average of its isotopes
true
The nucleus contains most of the mass of an atom and is positively charged
true
The outermost electrons of an atom are called the valence electrons
true
