Upgrade to remove ads
Only $2.99/month

Science of the physical world chapter 16

Terms in this set (77)

Atom
An element is matter that is composed of one type of
Atomic mass unit
The unit of measurement used for atomic particles is the
Isotopes
Atoms of the same element that have different numbers of neutrons are called
Number
In the periodic table elements are arranged by increasing atomic
Electrons
An electron dot diagram uses the symbol of an element and dots to represent the ________in the outer energy level
protons or neutrons
The electron has a very little mass compared to the
Neutrons and protons it has
The mass of the atom depends on the nucleus and how many
Number of an atom
The sum of the protons and neutrons is the mass
Mass number
The number of neutrons in an atom can be found by subtracting the atomic number from the
Mass unit designated by amu
The mass of the atom is so small that there is a measure called the atomic
Protons and neutrons
Make up the nucleus and are made up of quarks
Electron cloud
Electrons are found in an area around the nucleus called the
Protons
The nuclei of all atoms of a given element always have the same number of
Electrons
They will also have the same number of ________ around the nucleus
Neutrons
Some items may have more or fewer ________then will other Adams of the same element
Isotopes
Atoms of the same element different numbers of neutrons are called
Six protons
Every atom of carbon must contain ________ but some contain six neutrons and other have eight neutrons
The atomic number and the symbol
List two types of information that are given in each box of the periodic table
Left side
In the periodic table where are the metals located
Right side
On the periodic table where are the nonmetals located
Transition elements
elements in groups 3-12
Metalloids
What are the elements called that are next to the stairstep shaped line on the right side of the table
Chemical symbol
What do we call the letter or letters that represents an element
115
How many elements are there?
Unreactive
What name is given to the elements in group 18
Mass number
the total number of protons and neutrons in the nucleus
Electron cloud
a region around the nucleus of an atom where electrons are likely to be found
Nucleus
Positively charged center of an Adam
Group
Vertical column in the periodic table
Neutrons
Neutral particles in the nucleus of an atom
Average atomic mass
Weighted average mass of the mixture of its isotopes
Protons
Positively charged particles
Periodic table
Table of the elements showing repeated patterns in properties
Electron dot diagram
Represents the electrons in the outer energy level of an element
Electrons
Negatively charged particles
Isotopes
Atoms of the same element that have different numbers of neutrons
Atomic number
the number of protons in the nucleus of an atom
Period
horizontal row in the periodic table
Quark
smallest known particle that makes up protons and neutrons
Atom
The smallest piece of matter that still retains the properties of the element
Dmitri Mendeleev
Developed an early periodic chart
Atomic mass unit
approximately 1.67 x 10-24g
It is either the first letter of the element name or the first and another letter in the elements name
How is the chemical symbol of an element determined
Protons neutrons and electrons
What are atoms made up of?
6
How many types of quarks are there
Electron
negatively charged particle
Neutron
neutral charge
Nucleus
Positively charged center of an atom
Proton
Positively charged particle
Quark
Smaller particles that make up protons and neutrons
Chemical symbol
A capital letter or a combination of a capital letter and a small letter that is used to represent an element
Periods
Horizontal rows on the periodic table
Average atomic mass
An average of the masses of all the isotopes that occur in nature for an element
Groups
Vertical columns on the periodic table
Transition elements
Elements in the middle of the periodic table groups four through seven are called the
Atomic number
The number of protons in and atom
Quarks
Protons and neutrons are composed of
Nucleus
The Center of an atom where protons and neutrons are located
Mass number
A total count of the neutrons and protons in and atom is the
Isotopes
Atoms of the same element that have different numbers of neutrons
Metals
Elements that are found on the left side of the periodic table
Metalloids
Elements that have properties of both metals and nonmetals.
Electrons
The particles that move about the nucleus and have a negative charge
Electron cloud
The region around the nucleus occupied by electrons
Periodic table
Chart that shows the classification of elements
True
True or false every object in the universe is composed of atoms
False quark
True or false Protons are made of neutrons
True
True or false The sixth quark is also known as the top quark
False cloud
True or false the area around the nucleus where electrons are most likely to be found is called the electron chamber
False atomic number
True or False: The number of protons in an atom is called the atomic mass.
False the mass number
True or false the atomic number of an atom is the sum of the number of protons and the number of neutrons in the nucleus
Metalloids
Boron and silicon
Nonmetals
Oxygen bromine and carbon
Metals
Iron zinc and copper
Group, energy levels
Elements that are in the same_________ have the same number of electrons in their outer____________
Properties
These outer electrons are so important in determining the chemical_____________ of an element that a special way to represent them has been developed
dot diagram, Energy level
A_________ uses the symbol of the element and dots to represent the electrons in the outer__________
YOU MIGHT ALSO LIKE...