Chapter 17

D. Periodic

Which is a term for a pattern that repeats ? A. Isotopic B. Metallic C. Periodic D. Transition

Nucleus

Positively charged center of an atom

C. Electron

Which of the following is NOT found in the nucleus of an atom ? A. Proton B. Neutron C. Electron D. Quark

B. Argon

Which of the following is an element that would have similar properties to those of neon ? A. Aluminum B. Argon C. Arsenic D. Silver

Period

A____ is the horizontal row in the periodic table

Compare- they have the same elements and properties Contrast- chlorine -37 has 2 more neutrons that chlorine -35

Compare and contrast chlorine -35 and chlorine -37 isotopes.

A. 1

How many outer level electrons does lithium have ?

Electron cloud

In the current model of an atom, the electrons are located in the _________

A. Gas

In which of the following states is nitrogen found at room temperature ? A. Gas B. Metalloids C. Metal D. liquid

D. Solid

In which state of matter are most of the elements to the left of the stair- step line in the periodic table ? A. Gas B. Liquid C. Plasma D. Solid

Periodic table

Mendeleev created an organized table of elements called the

Mass number

The _____ is the sum of the number of protons and neutrons in an atom

Electron cloud

The area where modern scientists think electrons are likely to be found

B. 111

The atomic number of Re is 75. The atomic mass of one of its isotopes is 186. how many neutrons are in an atom of this isotope ?

D. 17

The halogens are located in which group ? A. 1 B. 11 C. 15 D. 17

B. Neutrons

The number of which type of particle determines the identity I that element ? A. Electrons B. Neutrons C. Protons D. Photons

Atom

The smallest piece of matter that keeps the properties of the element to which it belongs is called an _____

Quarks

There are six very small particles that make up protons and neutrons ___

Quarks

There are six very small particles that make up protons and neutrons and they are ______

Isotopes

Two elements with the same number if protons but a different number if neutrons are called ______

Atoms of the same element that have different numbers of neutrons.

What are isotopes ?

The atomic mass a particle has

What is the atomic mass of an atom

The number of protons in the nucleus

What is the atomic number of an atom

Total number of protons and neutrons

What is the mass number of an atom

B. Metalloid

Which Of the following terms describes boron ? A. Metal B. Metalloid C. Noble gas D. Non metal

B. Group 18 because they are noble gases

Which group of elements on the periodic table is the least reactive ? A. Group 1 B. Group 18 C. Group 2 D. Group 17

D. Magnesium

Which if the elements below is a shiny element that conducts electricity and heat ? A. Chlorine B. Sulfur C. Hydrogen D. Magnesium

Average atomic mass

is the weighted average mass of all the known isotopes for an element