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Questions and Answers
All matter is made of small particles called atoms.
All matter is made of small particles called atoms.
True
What is represented by the atomic number (Z) in an atom?
What is represented by the atomic number (Z) in an atom?
If an atom has a Z = 12, what element must it be?
If an atom has a Z = 12, what element must it be?
Magnesium
The number of protons __________ the element.
The number of protons __________ the element.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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Electrons are located in the nucleus of an atom.
Electrons are located in the nucleus of an atom.
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Atoms have no overall electrical charge as the number of __________ equals the number of __________.
Atoms have no overall electrical charge as the number of __________ equals the number of __________.
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What does the average mass number of an element represent?
What does the average mass number of an element represent?
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The mass number can be used to identify the element.
The mass number can be used to identify the element.
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What are isotopes?
What are isotopes?
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To determine the number of neutrons, you must round the atomic mass according to the rule: numbers 0-4 = ROUND ______, 5-9 = ROUND _____
To determine the number of neutrons, you must round the atomic mass according to the rule: numbers 0-4 = ROUND ______, 5-9 = ROUND _____
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Match the element to its properties:
Match the element to its properties:
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What element has 78 protons?
What element has 78 protons?
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What is the charge of a neutral atom?
What is the charge of a neutral atom?
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How many protons does an oxygen atom have?
How many protons does an oxygen atom have?
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The atomic mass of helium is 4.0026.
The atomic mass of helium is 4.0026.
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What is the primary characteristic that defines an element?
What is the primary characteristic that defines an element?
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An element is a _____________ that cannot be broken down into anything simpler.
An element is a _____________ that cannot be broken down into anything simpler.
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Match the following elements with their atomic number:
Match the following elements with their atomic number:
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Which of the following elements has 11 protons?
Which of the following elements has 11 protons?
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All elements have the same number of neutrons as protons.
All elements have the same number of neutrons as protons.
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What is the rounded atomic mass of carbon?
What is the rounded atomic mass of carbon?
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Which of the following statements about alkali metals is true?
Which of the following statements about alkali metals is true?
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The symbol for potassium is __________.
The symbol for potassium is __________.
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All halogens are solid at room temperature.
All halogens are solid at room temperature.
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What type of elements are noble gases?
What type of elements are noble gases?
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What is the number of neutrons in an aluminum atom with an atomic mass of 27?
What is the number of neutrons in an aluminum atom with an atomic mass of 27?
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The alkali metals become more reactive as you move __________ down the group.
The alkali metals become more reactive as you move __________ down the group.
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Match the following elements to their group:
Match the following elements to their group:
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Which category of elements is generally known for being good conductors of electricity?
Which category of elements is generally known for being good conductors of electricity?
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Non-metals are usually magnetic.
Non-metals are usually magnetic.
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What are the physical properties of metals?
What are the physical properties of metals?
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Most metalloid elements are __________ at room temperature.
Most metalloid elements are __________ at room temperature.
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Non-metals are typically __________ in appearance.
Non-metals are typically __________ in appearance.
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Which of the following is an exception to the state of non-metals at room temperature?
Which of the following is an exception to the state of non-metals at room temperature?
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Match the following categories with their properties:
Match the following categories with their properties:
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What distinguishes metalloids in terms of conductivity?
What distinguishes metalloids in terms of conductivity?
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All metalloids are good conductors of electricity.
All metalloids are good conductors of electricity.
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The majority of non-metals are ___________ at room temperature.
The majority of non-metals are ___________ at room temperature.
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Study Notes
Science 10 Unit 2: Chemistry - Atoms, the Periodic Table & Bohr Models
- Atoms are the fundamental building blocks of all matter
- Atoms are made up of smaller particles called protons, neutrons and electrons
- Protons have a positive charge and are located within the nucleus of an atom
- Neutrons have no charge and are also located within the nucleus of the atom
- Electrons have a negative charge and are found orbiting the nucleus in electron shells
- The periodic table organizes all known elements based on their atomic number (the number of protons)
- Each element has a unique symbol. Examples include: H, O, C, Mg, Na
- Elements on the periodic table are arranged in periods (rows) and groups (columns)
- Elements within the same group have similar properties
- Atomic number defines the identity of an element
- The mass number is the sum of protons and neutrons in an atom.
- Isotopes are atoms of the same element having a different number of neutrons but the same number of protons
- The periodic table shows atomic mass, which is the weighted average of the masses of all isotopes of an element, occurring naturally
- Bohr models depict atoms illustrating electrons orbiting a nucleus
- Electron shells around the nucleus have particular maximum electron capacities
- Valence electrons: outer most electron shell and determine chemical properties.
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Description
Test your knowledge on the fundamentals of atomic structure in this Chemistry Chapter 2 quiz. You'll learn about atomic numbers, protons, neutrons, isotopes and their properties. Prepare to match definitions and identify elements based on their atomic characteristics.
