Валентность: Электронная конфигурация

What is the electronic configuration of an oxygen atom?

• 1s2 2s3 2p3

• 1s2 2s2 2p4

• 1s2 2s1 2p5

• 1s2 2s2 2p3

What electrons participate in chemical bonding in the sodium atom?

• 4 electrons

• 1 electron

• 2 electrons

• 3 electrons

What is the valency of a chlorine atom?

• 1

• 2

• 3

• 4

What is the electronic configuration of a carbon atom?

• 1s2 2s1 2p3

• 1s2 2s2 2p2

• 1s2 2s2 2p3

• 1s2 2s3 2p2

How many valence electrons does an oxygen atom have?

• 6

• 4

• 8

• 10

What electrons fill the inner shells of an atom?

• s and d

• s and p

• p and f

• d and f

What electrons are located on the outer shell of an atom?

• Valence electrons

• Inner electrons

• Neutrons

• Protons

Which elements have a valency of 1?

• Boron (B)

• Hydrogen (H), Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), Francium (Fr)

• Beryllium (Be)

• Helium (He)

What elements have a valency of 2?

• Magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), radium (Ra)

• Oxygen (O)

• Carbon (C)

• Nitrogen (N)

What elements have a valency of 3?

• Silicon (Si)

• Phosphorus (P)

• Carbon (C)

• Boron (B), Aluminum (Al), Gallium (Ga), Indium (In), Thallium (Tl)