Year 10 Chemistry

The atomic number of an element tells you

• how many protons and neutrons it has
• how many protons and electrons it has
• its place on the periodic table
• the mass of the nucleus

The mass of an atoms nucleus is the sum of 

• protons + neutrons
• electrons + neutrons
• electrons + protons

What is the name of the element with an atomic number of 3?

• Lithium

• Magnesium

• Sodium

• Potassium

The electronic configuration of a magnesium ATOM is

• 2, 8

• 2, 8, 3

• 2, 6

• 2, 8, 2

The electron configuration of a magnesium ION is

• 2, 8, 6

• 2, 8, 8

• 2, 8, 2

• 2, 8

Elements from groups 1-3

• Are metals and lose electrons in a chemical reaction to become CATIONS

• Are metals and lose electrons in a chemical reaction to become ANIONS

• Are metals and gain electrons in a chemical reaction to become CATIONS

• Are metals and gain electrons in a chemical reaction to become ANIONS

Which element has an electronic configuration of 2, 7

• Chlorine

• Bromine

• Fluorine

• Iodine

Phosphorus does the following in a chemical reaction

• LOSES 3 electrons to become an ANION

• LOSES 3 electrons to become a CATION

• GAINS 3 electrons to become a CATION

• GAINS 3 electrons to become an ANION

When lithium and potassium react, they would undergo which type of bonding

• Ionic

• Metallic

• Covalent

• Diamagnetic

When sodium and bromine undergo a chemical reaction, ionic bonding takes place. Which description best matches what occurs?

• Sodium is from group 1. It gives its 1 valence electron to chlorine. Chlorine is from group 7. It received the 1 valence electron from sodium.

• Sodium is from group 7. It gives its 1 valence electron to chlorine. Chlorine is from group 1. It received the 1 valence electron from sodium.

• Sodium is from group 1. It receives 1 valence electron from chlorine. Chlorine is from group 7. It gives 1 valence electron to sodium.

• Sodium is from group 7. It receives 1 valence electron from chlorine. Chlorine is from group 1. It gives 1 valence electron to sodium.