Question | Answer |
Cemical properties | include changes that alter the identity of a substance |
The study of substances containing carbon is | organic chemisrty |
The particles in a solid are | packed closely together |
Group __ in the periodic table contains only metals. | 2 |
Physical means can be used to separate | mixtures |
An example of an extensive physical property is | mass |
Which element has properties most similar to those of sodium? | calcium |
What is an intensive physical property? | color |
WHat is not a property of metals? | unreactivity |
A vertical column of blocks in the periodic table is called a | group |
The symbol for the metric unit used to measure mass is | grams |
The symbol that represents the measured unit for volume is | mL |
The SI standard units fir length and mass are | meter and kilogram |
The SI base unit for time is the | second |
A change in the force of Earth's gravity on an object will affect its | weight |
The product of 13cm* 5.7 cm is correctly reported as | 74 cm(2) |
The graph of an inverse proportion is a | hyperbola |
The graph of a direct proportion is a | straight line |
The number of sig. digits in the measurment 210cm is | 2 |
How many minutes are in one week? | 10,080 |
NIckel-60 has | 32 neutrons |
Sulphur-34 contains | 18 neutrons |
Who called the atom an atom | Democritus |
Chlorine-35. It has | 17 protons, 17 electrons, and 18 neutrons |
what does the 218 in polonium-218 represent? | mass number |
Experiments with cathode rays led to the discovery of the | electron |
How many sig digs are in 50.00000s | 7 |
What is the atomic number of Tungsten | 74 |
How many sig digs are in .0050m | 4 |
What scientist discovered electrons? | J.J Thompson |
In SI, the frequency of electromagnetic radiation is measured in | hertz |
As it travels through space, electromagnetic radiation | exhibits wavelike behavior |
The distance between 2 successive peaks on a wave is its | wavelength |
A quantum of electromagnetic energy is called a | photon |
The wave model of light did not explain | the photoelectric effect |
The number of orbitals for d sublevel is | 5 |
For the f sublevel, the number of orbitals is | 7 |
The main energy level that can only hold 2 electrons is the | first |
Which group is noble gases | 18 |
What is th speed of light? | 3.00 * 10(8)m/s |
The number of valence electrons in Group 17 is | 7 |
The number of valence electrons in group 2 is | 2 |
The elements in group 1 are known as | alkali metals |
A positive ion is known as | cation |
A negative ion is known as | anion |
Argon, krypton, and xenon are | noble gases |
A horizontal row of blocks in the periodic table is called a | period |
Which group do fluorine and chlorine belong | halogens |
The elements that border the zigzag line in the perodic table are | metalloids |
Valence electrons are in the | highest energy level |
Most chemical bonds are | partly ionic and partly covalent |
AN octet is equal to | 8 |
A covalent bond results when __ are shared | electrons |
Atoms are __ when combined | more stable |
If 2 covalently bonded atoms are identical, the bond is | nonpolar covalent |
When atoms share electrons, the electrical attraction of an atom for the electrons is called the atom's | electronegativity |
THe elctrons involved in the formation of a chemical bond are called | valence electron |
If the atoms that share electrons have an unequal attraction for the electrons, the bond is called | polar |
B is not an example of what | molecular formula |
The elements of the __ group satisfy the octet rule without forming compounds | noble gases |