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2000
The Periodic Table
1


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Questionario a risposta multipla
1- What do the atoms of the same group have in common?
The same outer electronic structure
The same atomic number
The same number of the electrons
The same electronic structure
2- The atomic number is
the sum of the protons and neutrons in the nucleus
the sum of the protons and the electrons
the number of protons in the nucleus
the number of neutrons in the nucleus
3- The ionization potential of an atom is defined as:
the energy produced after the acquisition of an electron
a measure of the tendency to attract an electron
the energy required to remove an electron
a measure of the capacity to irradiate energy
4- Isotopes are two or more atoms of the same element having...
the same atomic number but different number of electrons.
the same mass number but different atomic number.
the same atomic number and different mass number.
the same mass number and atomic number.
5- Group VII A elements are called
noble gases
alkaline metals
halogens
calcogens
6- In the periodic table the elements with similar properties are:
in the same group
in the same period
in the same elettronic group
only in the families of metals of internal transition
7- Which of the following statements regarding the Group 0 elements is FALSE?
All of them are gaseous.
They have monoatomic molecule
They never form compounds
They have high energies of ionization
8- The number of valence electrons in a main group element is given by its
atomic number
mass number
period
group number
number of electrons
9- The smallest atoms are found where in the periodic table?
in the transition metals
in the lower left
in the upper left
in the upper right
in the lower right
10- Electron affinity is the name given to the energy that occurs when
an electron is removed from a gaseous atom or ion.
an electron is added to a gaseous atom or ion.
an electron is shared with a gaseous atom or ion.
a neutron is removed from a gaseous atom or ion.
a neutron is added to a gaseous atom or ion.
11- Elements on the right side of the periodic table are
metals
metalloids
semimetals
non-metals
12- A horizontal row in the periodic table is called a
group
row
family
period
13- The atoms of the same element have always the same...
number of neutrons
number of electrons
number of protons
mass number
14- If an atom has an atomic number of 50 and an atomic mass of 105, how many protons does it have?
50
55
0
105
15- If a proton were added to hydrogen what new element would you have?
Helium
Carbon
Oxygen
Lead
16- If a proton were taken away from oxygen what new element would you have?
Nitrogen
Fluorine
Carbon
Beryllium
17- What do the atoms of the same group have in common?
The same atomic number
The same electronic structure
The same outer electronic structure
The same number of electrons
18- What are isotopes?
Atoms with the same atomic number but different mass number
Atoms with the same mass number but different atomic number
Atoms with the same atomic number and the same mass number
19- In the modern periodic table, the elements are arranged:
according to their similarities in properties
by ascending order of atomic number
by ascending order of atomic mass
according to their similarities in properties and by ascending order of atomic number.
20- Atomic size generally
decreases as we move from right to left across a period
decreases as we move down a group
remains constant within a period
decreases as we move from left to right across a period



© Nino Vessella , 1996-.
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