A weather balloon with a 2-meter diameter at ambient temperature and pressure holds 525 grams of helium. This type of electronic probe can be used to determine the pressure inside the balloon.
What is a barometric probe?
100
Composed of protons and neutrons in the densest region of an atom.
What is the nucleus
100
A force that holds groups of two o more atoms togethr and makes them function as a unit.
What is a chemical bond?
100
The amount of energy needed to melt a solid
What is Heat of Fusion
100
Color change, formation of a solid, bubbles produced, or flame are indications of this.
What is a chemical reaction?
200
This type of probe is most appropriate for collecting data during a neutralization reaction.
What is a pH probe?
200
Two or more atoms
What is a molecule composed of
200
A bond between two elements, a metal and a non metal.
What is an Ionic Bond
200
Force acting over a distance
What is work?
200
Two reactants yield a single product.
What is a synthesis reaction?
300
A scientist observed changes in the gas pressure of one mole of gas in a sealed chamber with a fixed volume. To identify the source of the changes, the scientist should check for variations in this.
What is temperature of the chamber?
300
Shows the number of valence electrons around the nucleus of an atom.
What is a Lewis Dot Structure?
300
A bond between two elements that are both non metals.
What is a Non-Polar Covalent Bond
300
Energy cannot be created or destroyed, only converted from one form to another.
What is the first law of thermodynamics?
300
Sour and react with metals and have a pH of less than 7
What are the characteristics of acids?
400
Electrical fires cannot be safely put out by dousing them with water. However, fire extinguishers that spray solid carbon dioxide on the fire work very effectively. This method works because carbon dioxide does what?
What is displaces the oxygen?
400
This trend of the periodic table increases from left to right and increases top to bottom.
What is atomic radius?
400
The entropy of the universe is always increasing in a spontaneous process and remains unchanged in an equilibrium process.
What is the second law of thermodynamics?
400
Compounds break down into similar substances
What is a decomposition reaction?
500
When a metal is heated in a flame, the flame has a distinctive color. This information was eventually extended to the study of stars because this component of stars indicate which elements are present.
What is the color spectra?
500
Type of bond that involves 2 pairs of electrons shared between two atoms.
What is a double bond.
500
The type of bond encountered in the hydrogen molecule where electrons are shared by nuclei.
What is a covalent bond?
500
Negative charged particles surrounding the nucleus of the atom that cause chemical reactions.
What is an electron?
500
One or more reactants combine with oxygen releasing heat or light.