Writing Chemical Formulas for Ionic Compounds Quiz

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Questions and Answers

What does the atomic number (Z) represent?

Number of electrons in the nucleus

Total number of particles in the nucleus

Number of neutrons in the nucleus

Number of protons in the nucleus (correct)

Which statement best describes the mass number (A)?

Number of electrons in the nucleus

Number of neutrons in the nucleus

Number of protons + number of neutrons (correct)

Number of protons in the nucleus

What are isotopes?

Atoms of the same element with different numbers of neutrons (correct)

Atoms of different elements with the same number of neutrons

Atoms of the same element with different numbers of protons

Atoms of different elements with the same mass number

What is the complete chemical symbol notation for the isotope of hydrogen with one proton and two neutrons?

_1^3H Signup and view all the answers

What is the melting point of potassium?

64°C Signup and view all the answers

Which of the following is a physical property of potassium?

Melting point (64°C) Signup and view all the answers

Based on the text, which substance reacts with potassium?

Chlorine Signup and view all the answers

What does the text define as 'Element'?

A substance that cannot be decomposed into simpler substances by any chemical reaction Signup and view all the answers

In writing chemical formulas for ionic compounds, which of the following is always written first?

The positive ions Signup and view all the answers

What is the role of subscripts in the formula of an ionic compound?

To show the combining ratio for the ions Signup and view all the answers

Which type of compound is composed of a metal as the positive ion and a nonmetal as the negative ion?

Binary ionic compounds Signup and view all the answers

If more than one compound can be formed from the same elements, what should be used to indicate the number of each kind of atom?

Prefixes Signup and view all the answers

What is the maximum volume of water, in liters, that the fish tank can hold?

40.0 L Signup and view all the answers

What is the density of silver in g/cm3?

0.754 g/cm3 Signup and view all the answers

What is the volume of blood in m3?

$5.2 \times 10^{-6}$ m^3 Signup and view all the answers

What is the speed of the jogger in km/hr?

25 km/hr Signup and view all the answers

Study Notes

Atomic Structure

Atomic number (Z) indicates the number of protons in an atom's nucleus and defines the element.
Mass number (A) is the total number of protons and neutrons in an atom's nucleus.

Isotopes and Chemical Symbols

Isotopes are variants of an element that have the same number of protons but different numbers of neutrons.
The complete chemical symbol for the hydrogen isotope with one proton and two neutrons is ^3H or tritium.

Physical Properties and Reactivity

Potassium has a melting point of approximately 63.5 °C.
A physical property of potassium includes its accessibility and characteristic softness.
Water is a substance that reacts vigorously with potassium, producing hydrogen gas and potassium hydroxide.

Chemical Notation and Ionic Compounds

An 'Element' is defined as a pure substance that cannot be broken down into simpler substances by chemical means.
In chemical formulas for ionic compounds, the positive ion (cation) is always written first.
Subscripts in ionic compound formulas indicate the number of each type of atom present in the compound.

Compound Types and Quantities

Ionic compounds consist of a metal cation paired with a nonmetal anion.
When multiple compounds can form from the same elements, prefixes or subscripts are used to specify the number of each atom.

Measurements and Densities

The maximum volume of a standard fish tank can hold varies greatly, but an example is often around 200 liters.
The density of silver is approximately 10.49 g/cm³.
The average volume of blood in an adult human is about 5 liters or 0.005 m³.
A jogging speed averages around 8 km/hr, but varies based on individual stamina and pace.

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Description

Test your knowledge of writing chemical formulas for ionic compounds with this quiz. Questions cover the order of positive ions, representation of ion charges, and the use of subscripts to show the combining ratio.