The electron configuration of an element is 1s 2 2s 2 2p 6 3s 1 . Describe what most likely happens when an atom of this element comes near an atom having seven valence electrons.

They will most likely have a ionic bond as the element stated will pass it's outermost electron to the element with the seven valence electrons.

What type of ions do nonmetals naturally form?

Negative ions, by gaining electrons to fill the valence shell

Positive ions, by gaining electrons to fill the valence shell

Positive ions, by losing electrons to empty the valence shell

Negative ions, by losing electrons to empty the valence shell

What is the formula of the compound formed between chlorine (Cl) and calcium (Ca)?

CaCl 2 , because calcium loses two electrons and chlorine gains one electron.

CaCl, because calcium loses one electron and chlorine gains one electron.

ClCa, because chlorine gains one electron and calcium loses one electron.

ClCa 2 , because chlorine gains one electron and calcium loses two electrons.

Match each of the unknown ions to its appropriate description. V 2+

A metal that lost two electrons

A metal that lost three electrons

A nonmetal that gained three electrons

A nonmetal that gained two electrons

Match each of the unknown ions to its appropriate description. Z 2−

A nonmetal that gained two electrons

A metal that lost two electrons

A metal that lost three electrons

A nonmetal that gained three electrons

Match each of the unknown ions to its appropriate description. X 3+

A metal that lost three electrons

A metal that lost two electrons

A nonmetal that gained three electrons

A nonmetal that gained two electrons

Match each of the unknown ions to its appropriate description. Y 3−

A nonmetal that gained three electrons

A metal that lost two electrons

A metal that lost three electrons

A nonmetal that gained two electrons

A student made the Lewis dot diagram of a compound as shown. What is the error in the Lewis dot diagram?

Both electrons of Mg should be transferred to one O atom because the formula is MgO.

An O atom should transfer all its six electrons to Mg because the formula is MgO.

The electrons should be transferred from each O atom to Mg because Mg has fewer electrons.

The number of dots around Mg should be four because it has to transfer two electrons to each O.

Which of the following describes a covalent bond?

It is the sharing of electrons between atoms with an electronegativity difference below 1.7.

It is the exchange of electrons between atoms with an electronegativity difference above 1.7.

It is the exchange of electrons between atoms with an electronegativity difference below 1.7.

It is the sharing of electrons between atoms with an electronegativity difference above 1.7.

When two oxygen atoms bond together in O 2 , what type of covalent bond do they form?

A double bond, because they overlap orbitals to share one pair of electrons.

A double bond, because they overlap orbitals to share two pairs of electrons.

A single bond, because they overlap orbitals to share one pair of electrons.

A single bond, because they overlap orbitals to share two pairs of electrons.

A scientist calculated the energy required to break bonds in two unknown compounds, A and B. One compound has a covalent bond, and the other has an ionic bond. The table shows a record of these values. Based on the table, which of the following statements is true?

Compound B is covalent because sharing of electrons makes relatively weaker bonds.

Compound A is covalent because transfer of electrons makes relatively stronger bonds.

Compound A is ionic because sharing of electrons makes relatively stronger bonds.

Compound B is ionic because transfer of electrons makes relatively weaker bonds.

Two students made the Lewis dot diagrams of NH 3 . The diagrams are as shown. Which student drew the correct Lewis dot diagram?

Neither Student A nor Student B

What is the name of CuO? Explain how you determined the bond type and the steps you used to determine the naming convention for the compound.

Copper (II) Oxide Cu = Copper O = Oxygen Because copper is a metal and oxygen is a non-metal, therefore they form an Ionic bond. Also, the non-metal ends with an -ide. Therefore it is Copper Oxide. Because Oxygen has a 2- charge, copper needs a 2+ charge to be neutral.

Chemistry Module 3 - part 1

Authored by Tracylingling Tracylingling

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

An atom's valence electrons are located in the atom's outermost energy level.

True

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six

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Chemistry Module 3 - part 1

An atom's valence electrons are located in the atom's outermost energy level.

An atom has the following electron configuration.1s22s22p63s23p3How many valence electrons does this atom have?

An atom's Lewis dot structure has two dots. Which of the following elements could it be, and why?

Match each element to the number of electrons in its valence shell.Hydrogen (H)

Match each element to the number of electrons in its valence shell.Carbon (C)

Match each element to the number of electrons in its valence shell.Oxygen (O)

Match each element to the number of electrons in its valence shell.Magnesium (Mg)

The electron configuration of an element is 1s22s22p63s1. Describe what most likely happens when an atom of this element comes near an atom having seven valence electrons.

What type of ions do nonmetals naturally form?

What is the formula of the compound formed between chlorine (Cl) and calcium (Ca)?

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An atom has the following electron configuration.

1s²2s²2p⁶3s²3p³

How many valence electrons does this atom have?

Match each element to the number of electrons in its valence shell.

Hydrogen (H)

Match each element to the number of electrons in its valence shell.

Carbon (C)

Match each element to the number of electrons in its valence shell.

Oxygen (O)

Match each element to the number of electrons in its valence shell.

Magnesium (Mg)

The electron configuration of an element is 1s²2s²2p⁶3s¹. Describe what most likely happens when an atom of this element comes near an atom having seven valence electrons.