CHEMISTRY MATRICULATION SDS SEM1

An atomic diagram that shows protons, neutrons, and all electrons

• valance electrons

• diatomic molecules

• bohr models

• isotopes

Tags

NGSS.MS-PS1-1

Which of the following is an example of a chemical change?

• boiling water
• crushing a can
• tearing a paper
• burning a paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The faster the particles of a gas move the 

• lower the presssure
• lower the temperature
• the higher the pressure
• the fewer collisions

In the formula, MgCl₂, what does the 2 tell you?

• Chlorine has 2 valence electrons
• Chlorine has a 2+ charge
• Chlorine has a 2- charge
• There are 2 Chlorine atoms

Tags

NGSS.MS-PS1-1

If a solution has a pH of 4, the solution is

• neutral
• acidic
• basic
• saturated

What does a neutralization reaction produce?

• an acid
• a base
• salt and water
• sugar and water

What is ionization energy?

• How well an atom attracts electrons in a chemical bond

• The relative size of an atom

• An atom that has gained or lost an electron

• The amount of energy it takes to remove an electron from the valence shell of an atom

Tags

NGSS.HS-PS1-2

What is the formal charge of Cl?

• 0

• +1

• -1

• -2

Tags

NGSS.HS-PS1-1

What is the shape of PCl₅?

• Tetrahedral

• Octahedral

• Trigonal pyramidal

• Trigonal bipyramidal

Which molecule is nonpolar?

• NH₃

• OF₂

• SF₄

• PF₅