Atoms
Which of the following has a negative electric charge? proton, neutron, electron
What is electron
Determine the mass number and atomic number of a chlorine atom that has 17 protons and 18 neutrons.
What is Mass # 35 and Atomic # 17
Elements are organized in the periodic table by increasing atomic _____.
What is number
Explain how elements are abbreviated in scientific shorthand.
What is first letter capitalized and 2nd letter lower case
The number of _____ identifies the element.
What is protons
Which metals are most reactive
What is Group 1
What particles are found in the nucleus of an atom?
What is protons and neutrons
If the atomic number of an element is 5 and the mass number is 10, explain how you determine the number of neutrons.
What is Atomic Mass MINUS Atomic # (protons) EQUALS Neutrons
Horizontal rows of the periodic table are called _____.
periods
Identify the three regions the periodic table is divided into.
What is metals, nonmetals, metalloids
Atoms of the same element with different numbers of neutrons are called _____.
What is isotopes
Due to having a full outer shell, these element do not ordinarily form compounds
What are noble gases
Each energy level of an atom has a maximum number of _____ it can hold.
What is electrons
If a carbon atom has 7 neutrons and 6 protons, what is its mass number?
What is 13
The alkali metals are located in which groups?
What is 1
Explain the significance of the noble gases.
What is elements found by themselves in nature, stable, and energy levels filled
Vertical columns in the periodic table are called _____.
What are groups
Elements in a column of the periodic table have what 2 things in common?
What is similar properties and same number of electrons in the outer energy level
Define atom.
What is smallest piece of matter that still has the properties of the element
The maximum number of electrons allowed in the second energy level of an atom is _____
What is 8
The first periodic table based on atomic mass was devised by _____.
Who is Dmitri Mendeleev
Which element makes up 90% of the atoms in the universe and is highly reactive?
What is hydrogen
Describe three properties of elements that are metal.
What is shiny, good conductor, solid at room temperature
How many elements are on the periodic table?
What is 118
Identify the three particles that make up an atom along with their charges.
What is proton + electron - and neutron neutral
Explain why electron positions cannot be pinpointed
What is move too fast and some move between energy levels
Explain what the elements in the same period have in common.
What is have same number of energy levels
What is the only metal found in liquid state at room temperature?
What is Mercury
Moseley corrected the early problems of the periodic table by arranging the elements in order of increasing atomic _____.
What is number
Which group of elements share characteristics of both metals and nonmetals
what is metalloids
What is the region around the nucleus that is occupied by electrons called?
What is the electron cloud
Protons and neutrons are made up of smaller particles called _____.
What is quarks
The number of which particle determines the identity of an element?
What is proton
Elements in found in Groups 3 through 12 of the periodic table are called the _____ elements.
What are transition
Elements that are gases, brittle and poor conductors are _____.
What are nonmetals
Two common alkaline earth metals are
What is calcium and magnesium