Atoms & Elements

Which of the following best describes an atom?

• protons and neutrons grouped together
• protons and electrons grouped together
• a core (center) of protons and neutrons surrounded by electrons
• a core of electrons and neutrons surrounded by protons

Tags

NGSS.MS-PS1-1

Which of the following is found farthest from the center of an atom?

• nucleus
• proton
• neutron
• electron

Use your periodic table to answer the following question.
Which of the following atoms has 14 electrons?

• Carbon (C)
• Silicon (Si)
• Sulfur (S)
• Argon (Ar)

Tags

NGSS.MS-PS1-1

Use the picture of an atom below to answer the question.

Which statement best describes the part of the atom that is shown by the letter B?

• It is an electron, and it has a negative charge.
• It is an electron, and it has a positive charge.
• It is a proton, and it has a negative charge.
• It is a neutron, and it has a neutral charge.

Tags

NGSS.MS-PS1-1

Cobalt (Co) has 27 protons in each atom. Based on this information, which of the following also describes an atom of Cobalt?

• It has no neutrons.
• It has 27 electrons.
• It has 13 neutrons and 14 electrons.
• It has a total of 86 neutrons and electrons.

Tags

NGSS.MS-PS1-1

Manganese has an atomic mass of 55 and an atomic number of 25. What does this information reveal about most phosphorus atoms?

• They contain more neutrons than protons.
• They contain more protons than neutrons.
• They contain the same amount of protons and neutrons.
• They contain more electrons than neutrons.

Which of the following identifies the number and location of protons in a Sulfur atom (S)?

• 32 protons, located in the nucleus
• 16 protons, located in the nucleus
• 32 protons, located outside the nucleus
• 16 protons, located outside the nucleus

Tags

NGSS.MS-PS1-1

Iodine (I) has 53 electrons in each atom. Based on this information, which of the following also describes an atom of silver?

• It has 53 neutrons.
• It has 53 protons.
• It has 27 neutrons and 26 electrons.
• It has a total of 180 neutrons and electrons.

Tags

NGSS.MS-PS1-1

An element with an atomic number of 37 and an atomic mass of 85 has how many neutrons in each atom?

• 37
• 48
• 85
• 122

Tags

NGSS.MS-PS1-1

What makes an atom have a positive charge?

• more electrons than protons
• more neutrons than electrons
• more protons than electrons
• less protons than electrons