Biology 2.1 - The Nature of Matter (1)

The positively charged particle in an atom is the

• neutron.

• ion.

• proton.

• electron.

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Two or more different atoms are combined is known as what?

• symbol.

• isotope.

• element.

• compound.

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A covalent bond is formed by the 

• transfer of electrons.
• sharing of electrons.
• gaining of electrons.
• losing of electrons. 

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Which of the following is NOT an organic molecule found in living organisms?

• protein.

• nucleic acid (DNA and RNA).

• sugar (carbohydrate).

• salt.

• fat (lipid).

Which combination of particle and charge is correct?

• proton: positive
• electron: positive
• neutron: negative
• proton: negative

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In which of the following ways do isotopes of the same element DIFFER?

• in number of neutrons

• in number of protons

• in number of electrons

• atomic number

• atomic mass (atomic weight)

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NGSS.MS-PS1-1

Which has the greater electronegativity (EN)?

C, N, or O?

• C

• N

• O

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Which has the greater electronegativity (EN)?

H, C, N, O, or F?

• H

• F

• C

• N

• O

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Electronegativity is...

• how good an atom is at attracting electrons

• the ability of an atom to lose electrons

• the energy required to remove an electron from a specific atom

• how easy it is to make friends.

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The element has the highest electronegativity (EN) of all the elements listed on the periodic table?

• At

• F

• Cl

• Br

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