Aribo haribo tutorials 08054196292

Chemistry
Questions
1. An element belongs to a period in the periodic table because of
a. The number of atoms in its outmost shell
b. The shell number.
c. The electronic configuration in the azimuthal quantum number
d. The size of the atom.

2. The major reason why chemical reaction occurs among elements is that they have the tendency to
a. Attain the nearest noble gas structure
b. Become a metal
c. Become a non - metal
d. Become any noble gas

3. In electrovalency, most metallic atoms with few valence electrons give out electrons because
a. They are unstable
b. They require less energy to give away these electrons
c. They require more energy to give away these electrons
d. They need non - metals to operate.

4. Arrangement of ions in a regular pattern in solid crystal is called .....
a. Configuration
b. Atomic structure
c. Lattice
d. Buffer

5. In electrovalency, valence electrons are transferred and the atomic number is
a. Also reduced
b. stabilized
c. Unaffected
d. Destabilized.

6. Rare gases are stable electrons because they
a. Are monoatomic
b. Are volatile gases
c. Form ions easily
d. Have duplet or octet electronic configuration in their outermost shell.

7. Which of these is the same as isotopes of an element
a. Mass number
b. Number of neutrons
c. Number of protons and neutrons
d. Atomic number

8. Which element has an electronic configuration of 1s2 2s2 2p6 3s1?
a. Calcium
b. Potassium
c. Sodium
d. Nitrogen

9. Determine the maximum number of electron that can occupy the principal energy level N of an atom
a. 18
b. 8
c. 24
d. 32

10. Which of the following statement is not correct? In going across period 3 ( from sodium to argon)
a. The Melton point and boiling point increase gradually
b. The first ionization energy increases
c. The atomic size increases to the middle of the period and then decreases
d. There is a gradual change in their oxides from basic to acidic (argon does not form an oxide)
e. There is a gradual decrease in electro positive.