Chemistry, Ch.11, Physical i Science

What is a chemical bond?

• A chemical bond is a force that holds two or more atoms together.

• A chemical bond is a velocity that holds two or more atoms together.

• A chemical bond is not a force that holds two or more atoms together.

• A chemical bond is a nonmetal that holds five or more atoms together.

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NGSS.HS-PS1-1

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A model that represents valence electrons in an atom as dots around the element's chemical symbol is ________ ___ _______.

• proton dot diagram

• electron triangle diagram

• electron dot diagram

• electron sphere diagram

Tags

NGSS.HS-PS1-1

What is a valence electron?

• A valence electron is an innermost electron of an atom that participates in chemical bonding.

• A valence electron is an outermost electron of a melting point that participates in chemical bonding.

• A valence electron is an outermost electron of an atomic number that participates in chemical bonding.

• A valence electron is an outermost electron of an atom that participates in chemical bonding.

Tags

NGSS.HS-PS1-1

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Which element is the only element that belongs in a certain group, but doesn't have the same number of valence electrons as the other elements in its group?

• helium

• neon

• boron

• hydrogen

Tags

NGSS.HS-PS1-1

A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons is a _____ ________.

• rock molecue

• transition element

• polar molecule

• ice molecule

What is a covalent bond?

• A covalent bond is a chemical bond formed when two atoms share one or more pairs of valence electrons.

• A covalent bond is a chemical bond formed when three atoms share one or more pairs of valence electrons.

• A covalent bond is a chemical bond formed when two atoms share one or more pairs of alkaline earth metals.

• A covalent bond is not a chemical bond formed when two atoms share one or more pairs of valence electrons.

Tags

NGSS.HS-PS1-1

A ________ _______ is a group of chemical symbols and numbers that represent the elements that make up a compound.

• period

• halogen

• semiconductor

• chemical formula

Tags

NGSS.MS-PS1-1

What is an ionic bond?

• An ionic bond is not the attraction between positively and negatively charged ions in an ionic compound.

• An ionic bond is the attraction between positively and neutrally charged ions in an ionic compound.

• An ionic bond is the attraction between positively and negatively charged ions in an ionic compound.

• An ionic bond is the attraction between positively and negatively charged isotopes in an isotope compound.

What is a metallic bond?

• A metallic bond is a centripetal force formed when many metal atoms share their pooled valence electrons.

• A metallic bond is a bond formed when many metal atoms share their pooled valence electrons.

• A metallic bond is a bond formed when many nonmetal atoms share their pooled valence electrons.

• A metallic bond is not a bond formed when many metal atoms share their pooled valence electrons.

Tags

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Many ionic compounds dissolve in _____.

• fire

• sodium

• water

• luster