Chemistry  Semester Exam Clark HS 2024

Chemistry Semester Exam Clark HS 2024

Assessment

Flashcard

Chemistry

10th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a covalent compound?

Back

A covalent compound is a chemical compound formed by the sharing of electrons between atoms. Example: H₂S (Hydrogen Sulfide).

2.

FLASHCARD QUESTION

Front

How do you calculate the number of atoms in a mole?

Back

To calculate the number of atoms in a mole, use Avogadro's number (6.022 x 10²³). For example, 6.3 mol of Zn contains 6.3 x 6.022 x 10²³ = 3.8 x 10²⁴ atoms Zn.

3.

FLASHCARD QUESTION

Front

What is a cation?

Back

A cation is a positively charged ion, formed when an atom loses one or more electrons. Example: Na⁺ (Sodium ion).

4.

FLASHCARD QUESTION

Front

What is an anion?

Back

An anion is a negatively charged ion, formed when an atom gains one or more electrons. Example: Cl⁻ (Chloride ion).

5.

FLASHCARD QUESTION

Front

How do you determine the number of neutrons in an isotope?

Back

To find the number of neutrons in an isotope, subtract the atomic number (number of protons) from the mass number. Example: Potassium-39 has 39 (mass number) - 19 (atomic number) = 20 neutrons.

6.

FLASHCARD QUESTION

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, resulting in charged ions. Covalent bonds involve the sharing of electrons between atoms.

7.

FLASHCARD QUESTION

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10²³, which is the number of atoms, molecules, or particles in one mole of a substance.

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