Welcome to your Grade 9 Chemistry chapter 4
After carefully reading the following 30 questions, choose the correct answer.
1.
Which scientist showed that the proper sequence criterion for the periodic arrangement of atoms was atomic number?
2.
What are the vertical columns of elements in the periodic table called?
3.
Which group of elements is known as the alkali metals?
4.
How many groups (columns) are there in the modern periodic table?
5.
What is the term for the quantity of energy an isolated gaseous atom must absorb to discharge an electron?
6.
Which group of elements is known as the noble gases?
7.
Elements in a given group have the same number of:
8.
Which sub-shells are incompletely filled in the representative elements?
9.
Ionization energy is usually expressed in which unit?
10.
In a group, as the atomic radius increases, the ionization energy generally:
11.
What is the traditional name for Group IIA elements?
12.
Group VIIA elements are commonly known as:
13.
An atom of sodium (Na) has 3 main shells. In which period is it found?
14.
Which sub-shell electronic configuration is repeated at regular intervals in the periodic table?
15.
Which property involves the formation of an anion and the release or absorption of energy?
16.
Which two scientists independently came up with the periodic law?
17.
What is the electronic configuration of a neutral atom of Sodium (Z=11)?
18.
Which group is the "Nitrogen family"?
19.
According to the Modern Periodic Law, the properties of elements are periodic functions of their:
20.
How many main shells are in an atom of Fluorine (Z=9)?
21.
Which set of elements belongs to Dobereiner’s triad?
22.
Successive ionization energies always:
23.
Elements in the same group have similar:
24.
Which is the sub-group designated for transition elements?
25.
The valence electrons of nitrogen (Z=7) are:
26.
Which element is larger in atomic radius?
27.
What is the principal quantum number (n) for the outermost shell of noble gases (except He)?
28.
Period numbers in the periodic table correspond to the number of:
29.
Boron (Z=5) belongs to which family?
30.
Which factor primarily determines the strength of attraction between the nucleus and electrons?
