Matter & Change
Is compressibility a physical or chemical change.
What is a physical change?
Name the amount if significant numbers
0.07420
What is 4?
A mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together.
What is a chemical bond?
The tendency for an atom to attract e- to itself when it is chemically combined with another element.
What is electronegativity?
Which is smaller, and decimeter or a centimeter.
What is a centimeter?
Is odor a qualitative or quantitative observation?
Qualitative.
Is odor a qualitative or quantitative observation?
What is qualitative?
An uneven distribution of charge.
What is a polar bond?
A periodic table property that generally increases as it goes from the lower left to the upper right of the periodic table.
What is ionization property?
The distance from origin to crest in a wavelength.
What is amplitude?
The endothermic process.
What is a process that absorbs heat from its surroundings?
Calculate the density in g/mL of 0.4 L of solution weighing 150 grams.
We want to know the density in g/mL, but our volume is in liters. First, convert the volume to mL.
V = 0.4 L • 1000 ml/1L
V= 400 mL
Now we can calculate the density
D = 150g/400mL
D = 0.375 g/mL
2 or more correct Lewis structures can be drawn.
What is resonance?
What metals tend to do with electrons and ions.
What is lose electrons and form positive ions?
The electron configuration for the element K.
What is 1s22s22p63s23p64s1
Or
[AR]4s1
Identify each as an element, mixture, or compound.
1. H2O
2. Carbon
3. Ag
4. Table salt
5. Coffee
1. Compound
2. Element
3. Element
4. Compound
5. Mixture
Name the amount of significant numbers and convert it to scientific notation.
485.0
What is 4 sig figs and 4.850 x 102
The molecular geometry of NH3.
What is trigonal pyramid?
The amount of energy required to remove one e- from a neutral atom.
What is ionization energy (IE)?
How many atoms are in 5.5 moles of atoms?
What is 3.3 x 1024 atoms?
Identify each element as a metal, nonmetal, or metalloid.
1. Cl
2. Po
3. Ar
4. Ho
5. K
1. Nonmetal
2. Metalloid
3. Nonmetal
4. Metal
5. Metal
Which is smaller, and decimeter or a centimeter.
What is a centimeter?
What does VSEPR stand for?
What is valance-shell-electron-pair-repulsion?
Arrange elements in increasing atomic mass; made the 1st periodic table.
Who is Dmitri Mendeleev?
The ionic compound formula for ammonium sulfate.
What is (NH4+)2SO42-?