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Ch 14/16

DHS PS Ch 14/16

QuestionAnswer
The total energy of materials, particles is called? thermal energy
What is known as the energy of motion? kinetic energy
What is energy due to position or bonding called? potential energy
What is measured by temperature, and the average movements of molecules called? average kinetic energy
When the attractive forces between particles of a solid are broken it is known as the? melting point
Which state of matter are molecules slipping/sliding past each other? liquid
Which state of matter do molecules take the shape and volume of their container? gas
Vaporization that occurs at the surface is known as? evaporation
What is the point where pressure of a vapor is equal to the surface? boiling point
What is the state of matter that s positively and negatively charged? plasma
The increase of size due to temperature is known as? thermal expansion
________ occurs due to a strong attraction of its polar molecules? Water's Strange Expansion
As a solid melts and a liquid vaporizes, the temperature remains constant it is called the? heating curve of a liquid
The state of matter consisting of high-temperature gas with balanced positively and negatively charged particles is called? plasma
The increase in the size of a substance when the temperature increases is called? thermal expansion
When the temperature decreases, the size of a substance will ______? decrease
Expansion and contraction occur in _______? all three phases
How are temperature and kinetic energy related? temperature means the average kinetic energy of a substance, or how fast the paricles are moving.
The _________ of a substance is the temperature at which a solid begins to liquefy. meling point
How would you best describe the particles in a solid? particles that are tightly packed together, can only vibrate, definite shape and volume
When the temperature of a substance is lowered, its particles? vibrate more slowly
What is the energy an object has due to its motion? kinetic energy
What is the smallest piece of matter that still has the properies of the element called? atoms
What has an electrical charge of 1+? protons
What part of the atom has no or neutral charge called? neutrons
What has an electrical charge of 1-? electrons
Where are protons and neutrons located in an atom? nucleus
Where are electrons located in an atom? in the electron cloud surrounding the nucleus
What is the name of the model that shows electrons traveling in specific energy levels around a nucleus of protons and neutrons? electron cloud
What is the most useful method for describing atoms? constructing a model
An atom that contains 6 positive charges and 6 negative charges has what kind of charge? no net
Atoms consist of a positively charged center called a? nucleus
The negatively charged particles outside the nucleus of an atom are called? electrons
What is the name of the model of the atom that reflects the unpredictable motion of the electron? electron cloud model
Which atomic particle carries a 1+ charge? proton
What is mostly composed of the protons and neutrons in the nucleus? atomic mass
What is the unit of measurement for atomic particles that is one-twelth the mass of a carbon atom contaiing six protons and six neutrons called? atomic mass unit (amu)
The number of protons in an atom is called the? atomic number
What do we call the sum of the number of protons and neutrons in the nucleus of an atom? mass number
When atoms of the same element have different numbers of neutrons we call this an? isotope
Different isotopes can have _______ properties. different
How do you find the number of neutrons? mass number - atomic number
How do you identify an isotope? Look at the name of the element followed by the mass number
What is the weighted-average mass of an element's isotopes called? average atomic mass
The average atomic mass is closest to its most? abundant isotope
Where does the electron cloud model of an atom place protons, neutrons, and electrons? protons and neutrons are in a center nucleus surround by electrons traveling in specific energy levels
How do atomic number and mass number differ? atomic number = the number of protons in an atom; mass number = the sum of the number of protons and neutrons in an atom
When calculating the mass of an atom, the mass of an electron is? negligible (not significant)
The mass of a proton is measured in? atomic mass units
What are atoms of the same element that have different numbers of neutrons called? isotopes
What is the sum of the number of protons and neutrons called? mass number
How do you find the atomic mass of an element? the number of protons + the number of neutrons of an atom
An isotope of Boron will have a different number of? neutrons
The atomic number of an element is also the number of? protons in the nucleus of an atom of that element
the center of an atom where proton and neutrons are located is the? nucleus
A total count of the neutrons and protons in an atom is the? mass number
Atoms of the same element but with different numbers of neutrons are? isotopes
The particles that move about the nucleus and have a negative charge are? electrons
An atoms is comprised of what three components? proton, neutron, and electron
What has a charge of 1+? proton
What is the smallest part of an element that retains all the properties of the element? atoms
If you change the number of protons in an atom, you change the? element
The number of neutrons plus protons is called? mass number
Created by: pherriman