Atoms and Molecules

Is the atom the smallest piece of an element or of a compount?

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Element

Compound

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When you divide an atom, do you still have the same substance?

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Yes

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Elements always combine in certain fixed proportions when they form a compound

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True

False

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Law of Definite Propertions

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When two elements combine, there is some smallest chunk of one element that unites with one, or two, or three, or more smallest chunks of the other element.

True

False

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When water is formed from hydrogen and oxygen, _____ atoms of hydrogen combine with each atom of oxygen

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one

two

three

four

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In four molecules of water, how many hydrogen atoms are there?

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three

four

five

eight

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Describe the atomic composition of carbon dioxide

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CO₂

One carbon atom and two oxygen atoms

Two carbon atoms and one oxygen atoms

Two carbon atoms and two oxygen atoms

One carbon atom and three oxygen atoms

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HCI is hydrochloric acid. How many hydrogen atoms would twenty molecules of this acid contain?

Missing

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How many times more oxygen atoms than hydrogen atoms does the following compound contain?

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H₂SO₄

two times

three times

four times

five times

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If each oxygen atom has 16 times as much mass as each hydrogen atom

what is the ratio of the mass of oxygen in H₂SO₄ to the mass of hydrogen?

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Does an atom really look like the figure?

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Yes

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Will a microscope someday enable you to see an atom?

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Yes

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Bohr Model

The Bohr model of the atom is a theoretical construct that helps us visualize the (1) of atoms in already-tested situations and to predict their (2) in situations in which they have not been observed.

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behavior

position

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The Bohr atom is made up of ________ particles

Missing

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Bohr atom

The Bohr atom is made up of three particles: the proton, the electron, and the neutron. The (1) has a positive electrical chare and exists in the nucleus with electrically neutral (2). The negatively charged (3) revolve around the nucleus, in all directions and in all planes, as in the below figure.

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electrons

proton

neutrons

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What is the resultant electrical charge on an atom with two protons and two electrons?

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If each electron contains the same amount of negative electrical charge as a proton does positive charge, what is the resultant electrical charge on an atom with two protons and two electrons?

zero

neutral

zero or neutral

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If an atom is normally electrically neutral, what can you say about the number of electrons and protons?

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The same number of each

They have different numbers

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Refer to the nearby figure. How many protons would this atom have?

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two

three

four

five

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Which particles in the atom interact with those of another atom?

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the protons

the electrons

the neutrons

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To determine whether a particular atom is of a difference element than another what do you need to know about the atoms?

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the number of electrons

the number of protons in their nuclei

the element name

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The number of protons in the nucleus of an atom of an element is called the _ __

two words missing

Missing

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What is the atomic number of uranium?

Missing

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What element has only one proton in its nucleus?

Missing

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What does the atomic number tell us?

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the number of protons in the nucleus of the atom

the number of electrons in the atom

It is just a ranking of importance given to elements

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How many electrons does lithium have when it is neutral?

write digits

Missing

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Is the atom the smallest piece of an element or of a compount?

Correct Answer

Explanation

When you divide an atom, do you still have the same substance?

Correct Answer

Explanation

Elements always combine in certain fixed proportions when they form a compound

Correct Answer

Explanation

Law of Definite Propertions

Correct Answer

Explanation

When water is formed from hydrogen and oxygen, _____ atoms of hydrogen combine with each atom of oxygen

Correct Answer

Explanation

In four molecules of water, how many hydrogen atoms are there?

Correct Answer

Explanation

Describe the atomic composition of carbon dioxide

CO2

Correct Answer

Explanation

HCI is hydrochloric acid. How many hydrogen atoms would twenty molecules of this acid contain?

Correct Answer

Explanation

How many times more oxygen atoms than hydrogen atoms does the following compound contain?

H2SO4

Correct Answer

Explanation

If each oxygen atom has 16 times as much mass as each hydrogen atom

Correct Answer

Explanation

Does an atom really look like the figure?

Correct Answer

Explanation

Will a microscope someday enable you to see an atom?

Correct Answer

Explanation

Bohr Model

Correct Answer

Explanation

The Bohr atom is made up of ________ particles

Correct Answer

Explanation

Bohr atom

Correct Answer

Explanation

What is the resultant electrical charge on an atom with two protons and two electrons?

Correct Answer

Explanation

If an atom is normally electrically neutral, what can you say about the number of electrons and protons?

Correct Answer

Explanation

Refer to the nearby figure. How many protons would this atom have?

Correct Answer

Explanation

Which particles in the atom interact with those of another atom?

Correct Answer

Explanation

To determine whether a particular atom is of a difference element than another what do you need to know about the atoms?

Correct Answer

Explanation

The number of protons in the nucleus of an atom of an element is called the _____ ______

Correct Answer

Explanation

What is the atomic number of uranium?

Correct Answer

Explanation

What element has only one proton in its nucleus?

Correct Answer

Explanation

What does the atomic number tell us?

Correct Answer

Explanation

How many electrons does lithium have when it is neutral?

Correct Answer

Explanation

Quran Recitation

CO₂

H₂SO₄

The number of protons in the nucleus of an atom of an element is called the _ __