Sc 8 P 8 7

A neutralization reaction will (almost) always produce...

• water & salt

• water

• salt

• water & carbon

Identify the salt in the following equation:
Zn(OH)₂ + HNO₃   ---> H₂O  + Zn(NO₃)₂

• Zn(OH)₂

• HNO₃

• H₂O

• Zn(NO₃)₂

Tags

NGSS.MS-PS1-1

Which correctly describes a part of an atom?

• The electrons are positively charged

• The neutrons are negatively charged

• The nucleus does not have a charge

• The protons are positively charged

Which correctly identifies a part of the atom shown in the figure below?

• electron

• ion

• electron

• neutron

Tags

NGSS.MS-PS1-1

If the two atoms shown are the same element, which statement is true?

• They have a different number of protons

• They have a different number of neutrons

• They have a different number of electrons

• They have a different number of nuclei

Tags

NGSS.MS-PS1-1

The illustration below show the electron configuration of a hydrogen atom. Why is this diagram a good representation of the location of electrons within the atom?

• Scientists know the exact location of electrons in all atoms so they call this the cloud

• Scientists can't determine the exact location of electrons in atoms so they call this the cloud

• Scientists have determined that electrons do not move so they call this the cloud

• none of the above

Tags

NGSS.MS-PS1-1

What do the elements in the table have in common?

• Atoms in each element have 10 nuclei

• Atoms in each element have 10 protons

• Atoms in each element have 10 neutrons

• Atoms in each element have 10 electrons

The table below shows the number of protons, neutrons, and electrons for four atoms. Which of the atoms is a different element, and describe what would have to happen for it to become the same element as the others.

• Atom D is the different element. It would have to lose one proton to become the same element as the others.

• Atom B is the different element. It would have to lose two electrons so that the number of protons and electrons are equal

• Both atoms C and D are different elements. Each would have to lose one neutron so that the number of protons and neutrons are equal.

• Both atoms A and B are different elements. Each would have to gain one neutron so that number of protons and neutrons is no longer equal.

Tags

NGSS.MS-PS1-1

Which of the figures above best represents a compound?

• figure W

• figure X

• figure Y

• figure Z

Tags

NGSS.MS-PS1-1

When magnesium (Mg) metal is burned in the presence of oxygen gas (O₂), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different from the individual properties of magnesium and oxygen because magnesium oxide is

• a solution

• a mixture

• a compound

• an element

Tags

NGSS.MS-PS1-1