Chapter 4 Practice Questions. Which subatomic particle has a negative charge? 1.electron 2.proton 3.neutron 4.nucleus 1234567891011121314151617181920.

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Presentation transcript:

Chapter 4 Practice Questions

Which subatomic particle has a negative charge? 1.electron 2.proton 3.neutron 4.nucleus

Which of the following is unique for any given element? 1.Number of neutrons 2.Number of protons 3.Number of electrons

To find the number of neutrons in an atom, you would subtract… 1.Mass number from atomic number 2.Atomic number from mass number 3.Atomic number from electron number

What does the electron cloud model describe? 1.The most likely locations of electrons in atoms 2.The precise locations of electrons in atoms 3.The number of electrons in an atom 4.The mass of the electrons in an atom

Carbon’s atomic number is 6. This means that a carbon atom has… 1.Six neutrons in its nucleus 2.A total of six protons and neutrons 3.Six protons in its nucleus 4.A total of six neutrons and electrons

An atom’s mass number equals the number of… 1.Protons plus the number of electrons 2.Protons plus the number of neutrons 3.protons 4.Neutrons

The glowing of a neon light is caused by electrons emitting energy as they… 1.Move from lower to higher energy levels 2.Collide with other electrons 3.Move from higher to lower energy levels 4.Collide with the nucleus

A chemical symbol represents the ____ of an element. 1.name 2.reaction 3.group 4.structure

Atoms of the same element with different numbers of neutrons are called… 1.isotopes 2.ions 3.Radioactive elements

Which statement about subatomic particles is NOT true? 1.Protons and neutrons have almost the same mass. 2.Protons and electrons have opposite charges. 3.Protons and neutrons have the same charge

Which statement about the atomic nucleus is correct? 1.It is made of protons and neutrons and has a negative charge. 2.It is made of protons and neutrons and has a positive charge. 3.It is made of electrons and has a positive charge

What does the electron cloud model describe? 1.The most likely locations of electrons in atoms. 2.The precise locations of electrons in atoms. 3.The number of electrons in an atom

Atoms have no electric charge because they… 1.Have neutrons in their nuclei. 2.Have an equal number of electrons and protons. 3.Have an equal number of neutrons and protons

A particle that moves around the nucleus is the… 1.electron 2.proton 3.neutron

A certain atom has 10 protons, 10 electrons, and 12 neutrons. Its mass number is ____

Which number is the atomic number? 5 B

How many protons are found in boron? 5 B

How many electrons are found in boron? 5 B

How many neutrons are found in boron? 5 B

Which of the following is NOT true? A proton has a mass equal to 1 a.m.u. 2.An electron has a mass equal to 1 a.m.u 3.A neutron has a mass equal to 1 a.m.u. 4.An electron has a mass equal to 0 a.m.u.