SUMMATIVE TEST 1 - MATTER

COMPLETE NAME : (LAST NAME , FIRST NAME )

A student receives a model of an atom that contains seven protons, neutrons, and electrons, and has an atomic mass of approximately 14. What procedure can the student use to identify the atom?

• The student can reference the periodic table and find the element that has an atomic number of 7, which represents the number of neutrons in the atom.
• The student can reference the periodic table and find the element that has an atomic number of 14, which represents the number of protons and neutrons in the atom.
• The student can reference the periodic table and find the element that has an atomic number of 14, which represents the number of electrons and neutrons in the atom.
• The student can reference the periodic table and find the element that has an atomic number of 7, which represents the number of protons in the atom.

Use this element from the periodic table to answer the question. A student constructs a model of atomic structure for the element nitrogen. What sub particles should be visible in the nucleus of the atom model?

• Seven neutrons and seven protons
• Seven protons only
• Seven electrons and seven neutrons
• Fourteen neutrons and seven protons

Fluorine has an atomic number of 9 and an atomic mass of 18.998. How many protons does an atom of fluorine have?

• 18
• 9
• 10
• 19

The nucleus in the center of the atom is made up of —

• protons and electrons
• protons and neutrons
• mixtures and compounds
• neutrons and electrons

The atomic mass of an element equals the number of —

• protons + neutrons
• electrons
• protons
• protons + electrons

The atomic number of an element is always equal to the number of

• protons
• protons plus electrons
• neutrons
• protons plus neutrons

Which of the following is NOT an example of a chemical change?

• Leaves changing color
• Baking brownies
• Cutting hair
• Nail rusting

Cierra is on a camping trip with her parents. They decide to build a campfire to cook their dinner. The burning fire is an example of a — NOTE : EXOTHERMIC - something that's exothermic has to do with the release of heat. ENDOTHERMIC -characterized by or formed with absorption of heat.

• physical and exothermic change
• physical and endothermic change
• chemical and exothermic change
• chemical and endothermic change

For a student to be able to identify that a chemical change has occurred, which of the following could be observed?

• Change of color, production of odor, production of gas, production of light
• Change of color, did not produce a new substance, change shape of matter
• Change of color, change in size, no indication of energy input or output
• No change of color, no production of odor, no production of gas