Vocab
This is the simplest form of matter that has a characteristic set of properties.
What is an element?
How many atoms are in 1 molecule of H2O?
What do isotopes change in an atom?
What is number of neutrons and atomic mass?
What are the states of matter?
True or False: To move from one energy level to another, an electron must gain or lose a specific amount of energy.
What is true?
What is the term for combining 2 or more DIFFERENT atoms together?
What is a compound?
The number of protons in the nucleus of an atom.
What is atomic number?
In which state of matter are particles not held together by bonds and move freely?
What is gas?
True or false: Electrons emit light in excited state.
What is false?
A characteristic that is large enough to see, handle, or measure without magnification.
How do you identify the mass number of an atom?
What is protons + neutrons?
Helium has two naturally occurring isotopes, He-3 and He-4. The atomic mass of helium is 4.003 amu. Which isotope is more abundant in nature?
What is a solid?
What is the pattern formed when light emitted by an element is separated into different wavelengths?
What is atomic emission spectra?
The total kinetic energy of all the particles that make up the matter.
What is thermal energy?
What is the chemical symbol of an element with an atomic number 33?
What is As?
Calculate the average atomic mass of bromine. One isotope of bromine has an atomic mass of 78.92 amu and a relative abundance of 50.69%. The other major isotope of bromine has an atomic mass of 80.92amu and a relative abundance of 49.31%.
What is 79.91 amu?
What is liquid?
Describe the sequence of an atom emitting light.
What is atoms absorb energy while the electrons are in ground state causing the electrons to jump to a higher energy level called excited state. The atom is now unstable and electrons transition back to ground state. As electrons are moving back to ground state they emit a photon of light?
True or false: Potential energy is defined as energy store in the chemical bonds that hold atoms together.
How many neutrons does Chlorine have if it has an atomic number of 17 and a mass number of 35?
What is 18?
The element copper has naturally occurring isotopes with mass numbers of 63 and 65. The relative abundance and atomic masses are 69.2% for a mass of 62.93 amu and 30.8% for a mass of 64.93 amu. Calculate the average atomic mass of copper.
What is 63.55 amu?
Why does ice float on water?
What is the relationship between atomic emission spectra and the bohr's model?
What is specific electron transitions shown on the bohrs model corresponds to a specific wavelength of light on the atomic emission spectral chart?