Assessment 2.2

Draw a Covalent Model for two Nitrogen Atoms

Match the following

• Negatively Charged Ions

• Valence Electrons

• Number of electrons on the outer shell

• Isotope

• Positively Charged Ions

• Anions

• element that contain equal numbers of protons but different numbers of neutrons in their nuclei,

• Cations

• any atom or group of atoms that bears one or more positive or negative electrical charges

• Ions

Place in ascending order from least to greatest according to atomic number

• Helium

• Silicon

• Sodium

• Boron

• Calcium

Show the model for Mg+F and the final formula.

Atoms of which two elements will form an ionic bond?

• Mg and Cl

• N and O

• Fe and Co

• Rb and Al

Which compound will most likely be formed when lithium (Li) and nitrogen (N) are chemically combined?

• LiN

• LiN3

• Li3N

• Li2N

Which compound results from covalent bonding?

• Mg and O

• O2

• Ca and Al

• Li and Si

Which best describes the structure of fluorine-19?

• 2 electrons in the first energy level; 7 electrons in the second energy level

• 2 electrons in the first energy level; 8 electrons in the second energy level

• 9 protons and 9 neutrons in the nucleus

• 10 protons and 9 neutrons in the nucleus

How many atoms are in this compound

2Al (OH)2

Mathematical Equivalence

ON

An element located at Group 18 and Period 4 would be classified as which type of substance?

• A halogen

• A transition metal

• A nonmental

• A lanthanoid