SigFigs and SciNote
Atoms
Chemical/Physical
Conversions
Miscellaneous
100

How many sigfigs are in 0.010?

2

100

Which part of the atom is represented by the atomic number?

proton

100
Burning is always a ________ change. 

chemical

100

When we set up a dimensional analysis problem, we start by putting the number and unit provided in the top left. Where do we place the starting unit so that it will be cancelled out in the next track?

Bottom

100

The ______ electrons are the electrons in the outer most electron shell. 

valence

200

How many sigfigs are in 1.0 x 10-3?

2

200

Which subatomic particle(s) is/are located in the nucleus?

proton and neutron

200

Phase changes are always _________ changes. 

physical 
200

There are 24 hours in a day. How many hours are in a month (30. days)?

720 hours

200

A student measured a metal block that weighed 10.50 g and had a volume of 1.5 mL. What is the density?

7.0 g/mL

300

What is 1.5 x 102 in normal notation?

150

300
How many protons?  21Ne


10

300
Which of the following is ONLY considered chemical evidence of a chemical change?

melting, bubbling, rusting, color change

Rusting

300

I am 38 years old. How old am I in days? (1 yr = 365.25 days) Answer to the correct sigfigs. and round correctly. 

14,000 days

300

The periodic table is primarily made up of _____. 

metals

400

What is 0.26 x 0.199 ?

0.052

400

How many neutrons are in Carbon-14?

8

400

What is the change called that occurs when a solid becomes a gas?

sublimation

400

Tony weighs 142 lbs. How many grams does Tony weigh? (1 lb = 2.204 kg, 1 kg = 1000 g)

313,000 g

400

Student X weighed a substance 3 times: 1.75 g, 1.77 g, 1.75 g. The true mass was 2.1 g. The student's data is ________ but not _______.

The student's data is precise but not acurate.

500

What is 3.00(1.2 + 0.19) ?

4.2

500

How many protons, electrons, and neutrons? 23Na+1

P= 11 , e= 10, n= 12

500

Brass is made by melting and mixing copper and zinc together. By altering these ratios or adding other trace metals, manufacturers can customize the metal's strength, color, and corrosion resistance. Brass is considered a(n) (element, compound, homogeneous mixture, heterogeneous mixture)

homogeneous mixture

500

Copper has a high melting point of 1,920°F. What is this temperature in Kelvin? 

1.8(C +32) = F

(F-32)/1.8 = C

C +273 = K

1320 K   (1321.8 K)

500

Student X weighed a substance 3 times: 1.75 g, 1.77 g, 1.75 g. His average was 1.76 g. The true mass was 2.1 g. What is the percent error? 

16%

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