Chemical Elements Review
This worksheet covers fundamental concepts of chemical elements, including their properties, organization in the periodic table, and basic atomic structure for Grade 11 Science students.
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Chemical Elements Review
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Read each question carefully and answer to the best of your ability. Show all your work where applicable.
1. Which of the following best describes an element?
A substance that can be broken down into simpler substances by chemical means.
A pure substance consisting of only one type of atom.
A mixture of two or more different types of atoms.
A compound formed by the chemical combination of two or more elements.
2. The atomic number of an element represents the number of:
Neutrons in the nucleus
Protons and neutrons in the nucleus
Protons in the nucleus
Electrons orbiting the nucleus
3. The vertical columns in the periodic table are called , while the horizontal rows are called .
4. Elements in the same group on the periodic table tend to have similar properties.
5. Explain the significance of the atomic mass shown on the periodic table. What does it represent?
6. Refer to the element box below and answer the questions that follow.
a) What is the atomic number of this element?
b) What is the chemical symbol of this element?
c) How many protons does an atom of this element have?
7. All isotopes of an element have the same number of neutrons.
True
False
8. Nonmetals are generally good conductors of heat and electricity.
True
False
Use the words below to complete the sentences.
9. Elements that have properties of both metals and nonmetals are called .
10. The outermost electrons of an atom, which are involved in chemical bonding, are known as .