Unit 1 Review: Matter and Periodic Table

What is the atomic number of the atom shown?

• 8

• 12

• 18

• 39.948

Tags

NGSS.MS-PS1-1

An atom of the element _____ has an average atomic mass of about 16 amu.

• Oxygen

• Sulfur

• Nitrogen

• Neon

Tags

NGSS.MS-PS1-1

An atom with an atomic number of 12 and a mass number of 25 can be best described by which of these?

• An atom that contains 12 protons and 13 neutrons

• An atom that contains 13 protons and 12 neutrons

• An atom that contains 12 protons and 25 neutrons

• An atom that contains 25 protons and 12 neutrons

Tags

NGSS.MS-PS1-1

Which part of the diagram represents the nucleus?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-2

Consider the elements in the periodic table. As we move to the far right, the column on the far right is made up of ___ that are _____.

• gases; nonreactive

• metals; nonreactive

• metalloids; reactive

• gases; highly reactive

The element sodium has an atomic number of 11 and a mass number of 23. How many protons, neutrons, and electrons does on atom contain?

• 11p, 11e, 12n

• 11p, 12e, 11n

• 11p, 11e, 23n

Tags

NGSS.MS-PS1-1

The periodic table is an arrangement of the chemical elements, ordered by atomic number, into families, and by doing so illustrates the periodic properties of the elements. Considering the organization of the periodic table, which pair of elements represents a very reactive element and a very non-reactive element?

• cesium and neon

• silver and gold

• sodium and chlorine

• uranium and hydrogen

Twenty is the _____ of potassium.

• charge

• atomic mass

• atomic number

• number of neutrons

Tags

NGSS.HS-PS1-1

What is the atomic number of this element?

• 15

• 17

• 35

• 52

Tags

NGSS.MS-PS1-1

The majority of the mass of the atom is located in the ______.

• nucleus

• core electrons

• pions and quarks

• valence electrons

Tags

NGSS.HS-PS1-8