Miss. Munson atoms and elements
atoms and element vocab words
Terms in this set (41)
consists of two atoms of the same element in a covalent bond
capable of being hammered or rolled into sheets
elements that are shiny, good coductors of heat adn electricity, and solids at room temperature
posistively charged metallic ions surrounded by a cloud of electrons
element whose nucleus breaks down, giving off particles and energy
element in groups 3 through 12 of the periodic table
elements that are usually gases or brittle solids at room temperature, do no conduct heat or electricity well, and are not shiny
the ability to be drawn into wires
elements having properties of metals and nonmetals
elements that conduct an electric current under certain conditions
forms of the same element that have different molecular structures
element having more than 92 protons, the atomic number of uranium
the sum of the number of protons and neutrons in the nucleus
region around the necleus where the electrons are found
positively charged center of an atom
vertical columns in the periodic table
neutral particles in the nucleus of an atom
average atomic mass
weighted average mass of the mixture of its isotopes
positively charged particles in an atom
table of the elements arranged according to repeated changes in properties
electron dot diagram
represents the electrons in the outer energy level of an element
negatively charged particles in an atom
the smallest piece of matter
atoms of the same element that have different numbers of neutrons
number of protons in an atoms nucleus
horizontal row in the periodic table
smallest known particle that makes up protons and neutrons
developed an early periodic chart
atomic mass unit
approximately 1.67 x 10-24g
How is the chemical symbol of an element determined?
it is either the first letter of the element name (in most cases) or the first and another letter in the elements name
What are atoms composed of?
protons neutrons and electrons
How many types of quarks are there and what is the name of one of them?
6; top quark
Why do scientists use models to study atoms?
atoms are too small to see
Why has the atomic model changed over time?
different elements have been added and taken away, and more discoveries have been made
Why is the current atomic model called the electron cloud model?
to show electrons traveling in specific energy levels around a nucleus of protons and neutrons
a capital letter or a combination of a capital letter and a small letter that is used to represent an element
each energy level of an atom has a maximum number of _______ it can hold.
dot diagrams are used to represent
a chemical symbol represents the _____ of an element.
a particle that moves around the nucleus is a(n)_____
A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is_____
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