Significant Figures
Determine the number of significant figures in the following:
140.74 mL
5 significant figures
Convert the following value into scientific notation:
47,000
4.7 x 104
Solve the following and round to the correct number of significant figures:
(1.5 x 1020) / (3.0 x 1010)
5 x 109
These particles have a positive charge and are found in the nucleus of the atom.
What are protons?
This subatomic particle determines the identity of an element on the periodic table.
What is a proton?
Determine the number of significant figures in the following:
0.0041 g
2 significant figures
Convert the following value into scientific notation:
0.00008
8 x 10-5
Solve the following and round to the correct number of significant figures:
205.3 + 30.05
235.4
or
2.354 x 102
What is the electron cloud?
How many significant figures are in the measurement 0.004530?
4 significant figures
Determine the number of significant figures in the following:
1300 pm
2 significant figures
Convert the following value into standard notation:
4.75 x 10-4
0.000475
Solve the following and round to the correct number of significant figures:
(2.5 cm × 3.42 cm)
8.6 cm
These particles have an atomic mass of 1amu, but no charge.
What are neutrons?
Express 602,000,000,000,000,000,000,000 in scientific notation.
6.02 x 1023
Determine the number of significant figures in the following:
1.05 x 1014 molecules
3 significant figures
Correctly rewrite this number following the rules of scientific notation:
60 x 108
6.0 x 109
Solve the following and round to the correct number of significant figures:
(3 x 10-1) x (4 x 10-3)
1.2x10-3
This number is also the number of protons, and it is how the periodic table is organized.
What is the atomic number?
A student multiplies 2.34 × 10³ by 5.6 × 10². Write the answer in proper scientific notation with the correct sig figs.
1.3 × 10⁶
Rewrite this number so that it is correctly rounded to 3 significant figures:
1,410,500,030,785 particles
1,410,000,000,000 particles
or
1.41 x 1012 particles
Correctly rewrite this number in scientific notation, and round it to 3 significant figures:
47.056 x 10-4
4.71 x 10-3
A rock’s mass is measured as 15.67 g, and its volume is 2.4 cm³.
Calculate its density using the correct number of significant figures.
Density = mass/volume
6.5 g/cm3
To find the number of neutrons, you use these two numbers and some math. What are the numbers and the math involved?
Atomic mass - atomic number = number of neutrons
What are Mr. Wassam's two dogs' names?
Midnight and Luna