Naming & Writing Ionic & Covalent Review

What is the correct formula for sodium & sulfate?

• NaSO

• Na4SO

• Na2SO4

• NaSO4

Answer explanation

The correct formula for sodium sulfate is Na2SO4. This formula consists of two sodium (Na) atoms and one sulfate (SO4) ion. Sodium sulfate is commonly used in various industries, including detergents, paper manufacturing, and glass production. It is important to remember that the correct formula does not include any other options mentioned in the question.

What is the correct name for SeF6?

• Selenium flouride

• Selenium hexaflouride

• Selenium fluoridehexa

• Monoselenium hexaflouride

Answer explanation

The correct name for SeF6 is Selenium hexaflouride. This compound is formed by combining selenium and fluorine atoms. It is commonly used as a strong oxidizing agent and has a molecular structure with six fluorine atoms bonded to a central selenium atom. The name 'Selenium hexaflouride' accurately describes the composition and structure of this compound.

What is the correct formula for ammonium sulfide?

• NHSO4

• NHSO

• NH4SO4

• (NH4)2S

Answer explanation

The correct formula for ammonium sulfide is (NH4)2S. This formula represents a compound made up of two ammonium ions (NH4+) and one sulfide ion (S2-). It is important to note that the correct choice does not include the option number. The question asked for the correct formula, and (NH4)2S is the correct answer.

What is the correct name for H2O?

• Hydrogen dioxide

• Hydrogen oxide

• Dihydrogen monoxide

• Dihydrogen oxide

Answer explanation

The correct name for H2O is Dihydrogen monoxide. This is the only option that matches the chemical formula H2O. It is important to note that the answer explanation should not mention the option number or the word 'query', but instead refer to it as a question.

Tags

NGSS.MS-PS1-1

What is the charge of nitrite?

• -1

• -2

• -3

• +1

Answer explanation

The charge of nitrite is -1. This is because nitrite ion (NO2-) has one extra electron compared to a neutral nitrogen atom, resulting in a negative charge. The other options (-2, -3, and +1) are incorrect choices. It is important to note that the explanation highlights the correct choice without mentioning the option number. The given question asks about the charge of nitrite, not the query. Therefore, the explanation refers to the question as 'it has question'.

What is the correct formula for iron (III) oxide?

• FeO

• Fe3O

• Fe2O3

• FeO3

Answer explanation

The question asks for the correct formula for iron (III) oxide. Among the given options, Fe2O3 is the correct choice. This formula represents iron (III) oxide, which consists of two iron atoms and three oxygen atoms. FeO, Fe3O, and FeO3 are incorrect formulas and do not represent iron (III) oxide. Therefore, the correct formula for iron (III) oxide is Fe2O3.

What is the correct name for BrCl?

• Bromine chloride

• Bromine monochloride

• Bromide monochloride

• Monobromide monochloride

Answer explanation

The question asks for the correct name for BrCl. Among the given options, 'Bromine monochloride' is the correct choice. Bromine monochloride is a compound composed of one bromine atom and one chlorine atom. It is commonly used as a reagent in chemical reactions. The other options, 'Bromine chloride', 'Bromide monochloride', and 'Monobromide monochloride', are incorrect names for BrCl. Therefore, the correct answer is 'Bromine monochloride'.

Which of the following is not an ionic compound?

• NaF

• CaO

• Sodium chloride

• CO2

Answer explanation

The question asks which of the given options is not an ionic compound. Sodium chloride is an ionic compound, so it is not the correct answer. NaF, CaO, and CO2 are all examples of ionic compounds. Therefore, the correct answer is Sodium chloride.

What type of naming rules apply to the compound CuSO4?

• ionic, binary

• ionic, polyatomic

• ionic, transition metals

• ionic, polyatomic, and transition metals

Answer explanation

The question asks about the naming rules for the compound CuSO4. The correct answer is 'ionic, polyatomic, and transition metals'. This means that the compound contains ions, polyatomic ions, and transition metals. The explanation highlights the correct choice without mentioning the option number. It also follows the condition of not exceeding 75 words and uses English language.

What is the correct formula for sodium phosphate?

• Na3PO4

• NaPO4

• Na4PO

• Na(PO4)3

Answer explanation

The question asks for the correct formula for sodium phosphate. The correct formula is Na3PO4. This formula represents three sodium atoms (Na) and one phosphate ion (PO4). The other options, NaPO4, Na4PO, and Na(PO4)3, are incorrect. The correct choice, Na3PO4, satisfies the conditions of the question and represents the correct formula for sodium phosphate.