elements and electrons

CH 1

100

What are the SI units for mass, time, length, temperature, and quantity/amount?

mass: kilograms

time: seconds

length: meters

temperature: kelvin

quantity/amount: mole

200

What is the difference between accuracy and precision

Accuracy refers to how close you get to the true or accepted value. Precision refers to how close measurements are to each other

300

how many sig figs are in each of the following 

a)   00.03456    b)90000.   c) 24500

d) 0.00023400    e) 6.022 x 10²³

a) 4

b) 5

c) 3

d) 5

e) 4

400

convert 732 yards to miles

0.416 miles

500

For objects near the surface of the earth, the gravitational acceleration is a constant equal to 9.8 meters per second squared. What is this expressed in miles per hour squared? Round to 2 decimal places

 78919.11 mi/hr²

elements and atoms

100

What did J.J. Thompson and Rutherford contribute to discovery of atom. 

Rutherford- determined nucleus is positively charged and atoms are mostly empty space

J.J. Thompson- did cathode ray experiment which showed that electrons are negatively charged

200

what is the name of N2O

Nitrous oxide

300

when do you use ate v. ite (explain the diff between nitrate v. nitrite)

when do you use ic v. ous

when do you use the ide ending

ate v. ite are used in oxyanions, ate is always one more than ite. nitrate is NO3, nitrite is NO2

ic and ous are endings for acids. If the anion ends in "-ite" then the ending "-ous" is used. If the anion ends in "-ate" then the ending "-ic" used

The name of an ionic compound ends in: -ide if it contains just two elements.  

400

True or False: All atoms of carbon are identical. Explain.

False because isotopes exist. 

500

How many electrons, protons, and neutrons are in 

³He²⁺

Protons: 2

electrons: 0

neutrons: 1

formulas

100

Sarin is a toxic nerve gas that has a molecular formula of C₄H₁₀PO₂F. What is the molecular weight of Sarin? 

140.09 g/mol

200

Molar mass of C₆H₁₂O₆

180.156 g/mol

300

how is phosphoric acid written

H3PO4

400

write the formula of lead(II) nitrate

Pb(NO3)2

500

molecular formula of dianabol is C₂₀H₂₈O₂ 

_{what is the molar mass?}

300.4412 g/mol

random

100

write out Fe2O3 in IUPAC and old name

iron (III) oxide, ferric oxide

200

write out sodium carbonate heptahydrate

Na2CO3 . 7H2O

300

where are electrons located in an atom?

 Electrons are found in shells or orbitals that surround the nucleus of an atom

400

Which subatomic particle(s) mainly gives element's their chemical and physical properties?

electrons

500

What structure do ionic compounds have?

Lattice crystal structure

electrons

100

electron configuration of Neon

[He]2s²2p⁶

200

electron configuration of C

[He] 2s2 2p2

300

How many electrons are in arsenic's outermost orbital?

5 electrons

400

What is the electron configuration of Nb?

1s2 2s2p6 3s2p6d10 4s2p6d4 5s.

500

What is difference between intensive and extensive properties and what is an example of each?

Intensive is a mass independent property; ex: density, melting point. Extensive is a mass dependent property; ex: mass, moles, volume