Wave Properties

Which of the following statements is true about electrons?

• Adding or removing an electron from an atom changes the atomic mass.

• Adding or removing an electron from an atom changes the net charge.

• Adding or removing an electron from an atom changes the type of chemical element.

• Electrons are located in the nucleus of an atom.

Tags

NGSS.MS-PS2-3

An atom can have a charge when the _____ number changes.

• nucleus
• proton

• neutron

• electron

How many neutrons does the element on the periodic square have?

• 4

• 5

• 6

• 9

Tags

NGSS.MS-PS1-1

Ionization energy is _____.

• The amount of energy required to remove an electron from an atom or ion.
• The amount of energy required to add an electron to an atom or ion.
• The amount of energy released when an electron is added to an atom or ion.
• The amount of energy required to break a chemical bond.

Tags

NGSS.HS-PS1-1

The periods of the periodic table represent _____.

• Number of protons in an atom
• Number of neutrons in an atom
• Number of valence shells in an atom

• Number of electrons in an atom

The groups of the periodic table represent _____.

• The number of electrons in the outermost shell

• The number of neutrons in outer most shell

• The number of protons in outer most shell

• The atomic weight of an atom

Ca will form a Lewis dot diagram with _____ electrons.

• 4
• 6
• 2
• 8

If Ca and Cl are bonded, the molecule formed will be _____.

• CaCl

• Ca₂Cl

• CaCl₂

• Not possible

Tags

NGSS.MS-PS1-1

How many protons are contained in the nucleus of the atom shown in the diagram?

• 5

• 6

• 7

• 8

Tags

NGSS.MS-PS1-1

Which of these elements would you expect to have the greatest ionization energy?

• Chlorine (Cl)

• Magnesium (Mg)

• Boron (B)

• Gold (Au)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2