Atomic Structure Test RW

Abigail and Aiden are comparing elements in the same group of the periodic table. They notice that these elements share the same

• number of energy levels

• number of valence electrons

• atomic numbers

• atomic masses

Imagine Henry is building a model of an atom for his science project. What is the nucleus of the atom model made of?

• protons and electrons

• protons only

• protons and neutrons

• neutrons only

Aiden is studying chemistry and learns that an oxygen atom has a nucleus with 8 protons and 8 neutrons. How many electrons will a neutral oxygen atom have?

• 2

• 6

• 8

• 14

Tags

NGSS.MS-PS1-1

Michael was exploring a new planet and discovered an element that has 5 protons, 6 neutrons, and 8 electrons. What is the atomic number of this element?

• 5

• 6

• 8

• 11

Tags

NGSS.MS-PS1-1

Maya is analyzing a sample of an element that has 5 protons, 6 neutrons, and 8 electrons. What is the mass number of this element?

• 5

• 6

• 8

• 11

Tags

NGSS.MS-PS1-1

Imagine a solar system model where planets orbit a star. The farther a planet is from the star, the more it has.

• charge

• energy

• mass

• size

Tags

NGSS.HS-PS1-1

Lily and Zoe are discussing chemistry. Zoe asks, "Atoms of the same element that have different numbers of neutrons are called what?"

• molecules

• ions

• protons

• isotopes

Elijah is decorating his room with neon lights. He wants to know the total number of electrons in the outer shell of a neon atom to understand its stability. The total number of electrons in the outer shell of a neon atom is

• 1

• 2

• 8

• 18

Tags

NGSS.HS-PS1-1

James is building a model of an atom for his science project. He wants to know which particles determine the atomic number of an element. Can you help him?

• Protons only

• Neutrons and protons

• Neutrons only

• Protons and electrons

Lily is studying the nucleus of an atom in her science class. She learns that the total number of neutrons in the nucleus of any atom is equal to the

• mass number of the atom

• atomic number of the atom

• atomic number minus the mass number

• mass number minus the atomic number