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A mixture is...
A mixture is blend of any two or more kinds of matter, as long as each maintains its own unique properties
The half-life of an isotope is the time required for the half the nuclei in a sample to
undergo radioactive decay
A state of matter in which a material has no definite shape but has a definite volume is the ___ state.
Three samples of 1.12 g, 1.8 g, and 1.52 g are mixed together. The combined mass of the three samples expressed to the correct mumber of significant figures, would be recorded as
Nitrogen monoxide and oxygen, both colorless gases, from a red-brown gas when mixed. Nitrogen monoxide and oxygen are called the
How many half-lives are required for three-fourths of the nuclei of one isotope in a sample to decay ?
Which of the following lists ranks nuclear radiation from most massive to least massive?
alpha, beta, and gamma
Which of the following particles has the same mass as an electron but a positive charge and is sometimes emitted from the nucleus during radioactive decay?
Using a metric ruler with 1 mm divisions, the sides of a rectangular piece of plywood were measure as 3.54 cm and 4.85 cm, which corresponds to an area of 17.1690 cm2. Which of these shows the area expressed
The density of pure diamond is 3.5 g/cm3. What is the volume of a diamond with a mass of 0.25 g?
All of the following describe the Heisenberg uncertainity prinicple except
it helps to locate an electron in an atom
A compund is
a substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances
If electromagnetic radiation A has a lower frequency than electromagnetic radiation B, then compared to B, the wavelength of A is
The average atomic mass of an element is the average of the atomic masses of its
naturally occurring isotopes
The average distance between the Earth and the moon is 386 000 km. Expressed in scientific notation, this distance is written as
3.86 x 10^5 km
The mass of a sample containing 3.5 mol of silicon atoms (atomic mass 28.0855 amu) is approximately
The dimensions of a rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. Tje volume should be
If 63.5 g of cooper (Cu) combine with 16 g of oxygen (O) to form the compound CuO, how many grams of oxygen will be meeded to combine with the same amount of cooper to form the compound CuO2
How are elements artificially transmuted?
Stable nuclei are bombarded with charged and uncharged particles
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