1st Semester Science Final Review I

Which of the following statements is true about electrons?

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

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

• 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.HS-PS1-2

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

• nucleus
• neutrons
• electrons
• protons

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

• 5

• 4

• 9

• Not possible to determine

Ionization energy is _____.

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

Tags

NGSS.HS-PS1-1

Atomic radius on the periodic table _____.

• Decreases from left to right across a period.

• Remains constant from top to bottom within a group.

• Increases from left to right across a period.

• Decreases from top to bottom within a group.

Photosynthesis is how plants make _____.

• oxygen
• water
• carbon dioxide
• glucose

Tags

NGSS.HS-LS1-5

NGSS.HS-LS1-6

Ca will form a Lewis dot diagram with _____ electrons.

• 4
• 6
• 2
• 8

Tags

NGSS.HS-PS1-1

Which of the following shows the elements in order from smallest to largest atomic mass?

• Rb, Cl, K, Br

• K, Br, Rb, Cl

• Br, Cl, Rb, K

• Cl, K, Br, Rb

Tags

NGSS.MS-PS1-1

How do you estimate the atomic mass of an atom?

• By adding the number of electrons and protons in the nucleus of the atom.
• By adding the number of protons and neutrons in the nucleus of the atom.
• By subtracting the number of electrons from the number of protons in the nucleus of the atom.
• By multiplying the number of protons and electrons in the nucleus of the atom.

Which of the following has the highest ionization energy?

• Aluminum (Al)

• Strontium (Sr)

• Fluorine (F)

• Barium (Ba)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2