Grade 8 1st Quarter Exam

Aiden is studying the periodic table and comes across an element. What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

Avery is studying the Bohr model of an atom in her chemistry class. She wants to know the atomic number of the atom shown in the model. What is the atomic number of this atom?

• 11

• 12

• 13

• can't be determined

Sophia is organizing her chemistry notes and wants to group elements with similar properties. Based on the periodic table of elements, which of the following sets of elements should she group together?

• Pb, Sn, Kr

• Ne, N, O

• Cl, Br, I

• O, S, N

In Daniel's science class, they learned about _______________________ atomic model, where negative electrons were like plums in a pudding with the pudding being positive.

• Thomson’s

• Dalton’s

• Democritus’s

• Rutherford’s

Grace is studying the periodic table and wonders, an element’s atomic number is equal to its number of . . .

• valence electrons

• neutrons

• protons

• protons and neutrons.

Scarlett is organizing her bookshelf. The group or family of books on the shelf is….

• The vertical columns of the bookshelf

• The horizontal rows of the bookshelf.

During a science class, Aiden and Liam were discussing elements on the periodic table. Aiden asked, 'What are metals on the periodic table characterized by?'

• An element that has some characteristics of both metals and non-metals.

• An Element that lacks most of the properties of a metal.

• A class of elements characterized by physical properties that include shininess and conductivity.

During a science class, Daniel was asked to identify metalloids on the periodic table. Metalloids are…

• An element that has some characteristics of both metals and non-metals.

• An Element that lacks most of the properties of a metal.

• A class of elements characterized by physical properties that include shininess and conductivity.

Harper is learning about elements in her chemistry class. What is a chemical Symbol?

• The number of protons in the nucleus and the number of electrons in the electron cloud.

• The sum of the protons and neutrons.

• A one or two letter abbreviation derived from the elements English of Latin name.

Priya and Mia are discussing the type of bond that forms between a non-metal and another non-metal. They conclude it will be a ________ bond.

• metal

• ionic

• covalent

• polar