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Science

7th Grade

NGSS covered

Used 9+ times

Formulas and bonding
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33 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Law of Conservation of Matter states:

What you end with must be EXACTLY identical to what you start with.

Matter cannot be created or destroyed, it just changes form.

Reactants and products do not have to be alike in any way.

There is no Law of Conservation of Matter.

Tags

NGSS.MS-PS1-5

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT CORRECT?

Ionic Bonding: Metal with Nonmetal: transferring electrons

Covalent Bonding: Nonmetal with nonmetal: Sharing electrons

Elements on right side of periodic table tend to lose electrons

Elements on left side of periodic table tend to lose electrons

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When balancing chemical equations...

change only the subscripts.

change only coefficients.

change nothing.

change the reactants.

Tags

NGSS.MS-PS1-5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the very first thing you have to determine to see if an atom will bond with another atom?

the number of valence electrons

oxidation number

chemical formula

ionization energy

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many electrons are needed in the valence shell of most atoms for the atom to be chemically stable?

3

6

18

8

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A chlorine atom (Cl) has ____

1 valence electron.

no electrons.

7 valence electrons

a stable configuration.

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which are "lenders" of electrons when combining?

compounds

metals

nonmetals

right side of periodic table

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