Unit 6 Lesson 6 & 7 Test Review
Carbon has an atomic number of 6. Based on this evidence, what can you claim about carbon?
the number of protons in a carbon atom
An atom's mass number is 210 and its atomic number is 85. Based on this evidence, how many neutrons does the atom have?
125
Alexandra knows that the atomic number of the element potassium, K, is 19. She also knows that one particular isotope of potassium has a mass number of 39. How many neutrons can be found in the nucleus of this isotope of potassium?
20
Consider a wooden chair and a balloon. Which claim describes what these two objects always have in common?
Both are made of atoms.
The name is the word below the large letter or letter combination in the box.
Emilio wants to tell a friend where an element's name is located within its box in the periodic table. Which is an accurate explanation of where to find an element's name?
What evidence best supports the claim that a substance has ductility?
It can be made into a wire.
Atoms of different elements can join together in different arrangements to produce a variety of substances that are found on Earth. There are more than 100 known elements. Which of the following best describes these elements?
Most of the elements are metals.
Any atom that has 13 protons is an aluminum atom. Which statement best describes what would happen if a proton were added to an aluminum atom?
The atom would no longer be aluminum.
substance C
The diagram below shows what happens during the formation of a compound. The diagram shows two substances joining together to form a third substance. Which of these substances is a compound?
Why is the mass of an atom's electrons not included in the atom's mass number?
The electrons are much less massive than the rest of the atom.
They are metalloids.
The periodic table of the elements is divided by a zigzag line. The elements on either side of the line have distinct properties. What claim can be supported by evidence for most of the elements that lie along the zigzag line?
It is shiny and can be bent and shaped.
The periodic table, shown below, arranges elements according to their properties. Elements at the left are metals and have the properties you'd expect a metal to have. Based on its location in the periodic table, what statement best describes the element Ca?
Sucrose is another name for table sugar. Sucrose is a compound made from the elements carbon, hydrogen, and oxygen. Which statement best describes the properties of sucrose?
They are different from the properties of all the elements sucrose contains.
Marcus wants to use two objects to compare the sizes of a proton and an electron. If he uses a basketball for a proton, which object would best represent an electron?
a pea
Quan is an artist who makes jewelry using a technique called hammering. Hammering is when a person uses a mallet or special hammer and repeatedly hits the material to make patterns or to shape the material. In which area of the periodic table should Quan look to find materials that would be suitable for making this jewelry?
among the metals
Calcium is an element. What is the smallest particle of calcium that has the same chemical properties of calcium?
an atom of calcium
Which of these particles is the smallest?
an electron
Atoms are the basic building block of items on Earth. Atoms make up the elements that combine as molecules to make up much of what we use every day. Which of these substances is not made out of atoms?
electrons
A row of 100 million atoms of a single type would be only about 1 centimeter (cm) long. What occupies most of this space?
empty space
The prefix semi- means "partly." Based on your knowledge of the properties of elements, which kind of element is most likely used to make semiconductors?
metalloids
