Key Terms Test Chemical Interactions Chapter 1 Section 1

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| By Roy.manning

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Questions: 11 | Attempts: 308 | Updated: Feb 23, 2023

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Key Terms Test Chemical Interactions Chapter 1 Section 1 - Quiz

CORRECTLY RESPOND TO THE FOLLOWING ITEMS.

Questions and Answers

1.

An __________ is substance that cannot be broken down into any other substances by chemical or physical means.

Explanation
An element is a substance that cannot be broken down into any other substances by chemical or physical means. This means that elements are the fundamental building blocks of matter and cannot be further simplified or decomposed into simpler substances. Each element is characterized by its unique atomic number, which represents the number of protons in the nucleus of its atoms. Examples of elements include hydrogen, oxygen, carbon, and gold.

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2.

A_________ is substance made of two or more elements chemically combined in a specific ratio, or proportion.

Explanation
A compound is a substance that is formed by the chemical combination of two or more elements in a specific ratio or proportion. In other words, it is a substance that has a fixed composition and can be broken down into simpler substances through chemical reactions. Compounds are different from mixtures, as mixtures can be separated into their individual components through physical means. Compounds have unique properties that are different from the properties of their constituent elements, making them distinct substances.

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3.

A _______ is two or more substances that are mixed together but not chemically combined.

Explanation
A mixture is a combination of two or more substances that are physically mixed together but do not undergo a chemical reaction. In a mixture, the substances retain their individual properties and can be separated by physical means, such as filtration or distillation. This is different from a chemical compound, where the elements are chemically combined and cannot be easily separated.

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4.

The smallest particle of an element is called an ___________.

Explanation
An atom is the smallest particle of an element that retains the chemical properties of that element. It consists of a nucleus, which contains protons and neutrons, and electrons that orbit around the nucleus. Atoms combine to form molecules and compounds.

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5.

scientific theory
- A.
  
  A well-tested idea that explains and connects a wide range of observations.
- B.
  
  The smallest particle of an element is called an
- C.
  
  Two or more substances that are mixed together but not chemically combined.
- D.
  
  A substance made of two or more elements chemically combined in a specific ratio, or proportion.
Correct Answer
A. A well-tested idea that explains and connects a wide range of observations.

Explanation
A scientific theory is a well-tested idea that explains and connects a wide range of observations. It is not a particle of an element, a mixture of substances, or a substance made of elements chemically combined. A scientific theory is based on extensive research and experimentation and is supported by evidence. It provides a framework for understanding and predicting natural phenomena.

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6.

electrons
- A.
  
  The smallest particle of an element is called an
- B.
  
  Two or more substances that are mixed together but not chemically combined.
- C.
  
  Anything that has mass and occupies space
- D.
  
  Negatively charged particles that move around outside the nucleus of an atom.
Correct Answer
D. Negatively charged particles that move around outside the nucleus of an atom.

Explanation
Electrons are negatively charged particles that orbit around the nucleus of an atom. They are the smallest subatomic particles and have a negligible mass compared to protons and neutrons. Electrons play a crucial role in chemical reactions and the formation of chemical bonds.

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7.

nucleus
- A.
  
  The smallest particle of an element is called an
- B.
  
  The central core of the atom, containing protons and usually neutrons.
- C.
  
  Anything that has mass and occupies space
- D.
  
  Negatively charged particles that move around outside the nucleus of an atom.
Correct Answer
B. The central core of the atom, containing protons and usually neutrons.

Explanation
The correct answer is the central core of the atom, containing protons and usually neutrons. This is because the nucleus is the densest part of an atom and is composed of positively charged protons and neutral neutrons. It is responsible for the mass of the atom and determines its identity. The electrons, which are negatively charged particles, orbit around the nucleus.

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8.

protons
- A.
  
  The smallest particle of an element is called an
- B.
  
  Negatively charged particles that move around outside the nucleus of an atom.
- C.
  
  Small, positively charged particles that are found in the nucleus of an atom.
- D.
  
  The central core of the atom, containing protons and usually neutrons.
Correct Answer
C. Small, positively charged particles that are found in the nucleus of an atom.
9.

energy level
- A.
  
  A region of an atom in which electrons of the same energy are likely to be found.
- B.
  
  The central core of the atom, containing protons and usually neutrons.
- C.
  
  Small, positively charged particles that are found in the nucleus of an atom.
- D.
  
  Negatively charged particles that move around outside the nucleus of an atom.
Correct Answer
A. A region of an atom in which electrons of the same energy are likely to be found.

Explanation
The answer correctly defines an energy level as a region within an atom where electrons with the same energy are likely to be found. This definition aligns with the concept of energy levels in atomic structure, where electrons occupy specific energy levels or orbitals around the nucleus. Each energy level can hold a specific number of electrons, and electrons within the same energy level have similar energy.

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10.

neutrons
- A.
  
  A region of an atom in which electrons of the same energy are likely to be found.
- B.
  
  Negatively charged particles that move around outside the nucleus of an atom.
- C.
  
  Small, positively charged particles that are found in the nucleus of an atom.
- D.
  
  Small, uncharged particles that are found in the nucleus of an atom.
Correct Answer
D. Small, uncharged particles that are found in the nucleus of an atom.

Explanation
Neutrons are small, uncharged particles that are found in the nucleus of an atom. This means that they do not have a positive or negative charge like protons or electrons. Neutrons play a crucial role in determining the stability and mass of an atom. They help to hold the nucleus together by balancing the repulsive forces between the positively charged protons. The number of neutrons in an atom can vary, resulting in different isotopes of the same element.

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11.

Anything that has mass and occupies space is__________.

Correct Answer
matter

Explanation
Matter is anything that has mass and occupies space. It refers to the physical substances that make up the universe, including both living and non-living things. Matter can exist in various forms such as solid, liquid, or gas. This definition encompasses all objects and substances that we can perceive and interact with in our everyday lives.

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Current Version
Feb 23, 2023

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Sep 07, 2011

Quiz Created by
Roy.manning

Key Terms Test Chemical Interactions Chapter 1 Section 1

An __________ is substance that cannot be broken down into any other substances by chemical or physical means.

A_________ is substance made of two or more elements chemically combined in a specific ratio, or proportion.

A _______ is two or more substances that are mixed together but not chemically combined.

The smallest particle of an element is called an ___________.

scientific theory

electrons

nucleus

protons

energy level

neutrons

Anything that has mass and occupies space is__________.