Chemistry Test 1

a neutral gold atom has atomic number 79 and mass of 191. How many electrons does it have?

Sodium

Homogeneous part of a system in physical contact but distinct from other parts of system

Silver

ion with 3 protons, 4 neutrons and 2 electrons is an anion

as internal kinetic energy increases, temperature increases

calculate mass: vol= 5.50cm³ and density= 4.20g/cm³

particle of an atom with smallest mass

convert 0.00314 to scientific notation

Nitrogen

discovery of nucleus and planetary (nuclear) model were result of the gold-foil experiment.

which is NOT a chemical change

separating liquids based on boiling points is chromatography

energy possessed by matter due to its motion

convert 77°F to Celsius

which is NOT an evidence of chemical change?

this subatomic particle is NOT found in the nucleus of an atom

What type of chemist would most likely study alcohols made with carbon, hydrogen, and oxygen

which is a chemical property?

smallest particles a compound may be broken down to without changing to diff. sub is formulas

what is one billionth (10^-9 ) of a tesla?

answer 17.81 + 45.30 + 60.0077 using significant figures properly

Developed the atomic theory of matter

atoms with same number of protons but different number of neutrons

Convert 100°C to Kelvins

how many lux (lx) are in 1 Mlx?

group of two or more atoms linked together by chemical bonds

a neutral gold atom has atomic number 79 and mass of 191. How many neutrons does it have?

which does NOT contain any uncertainty

The number of this type of particle identifies the atom as a given element

Which of the following statements does ¹¹⁵₄₉ In imply?

if mass of atom is 5 times mass of carbon-12, then mass is 60 u.

which is a homogeneous mixture?

Express 2.903×10³ in regular decimal form

measure on force of gravity on an object is mass.

Calcium

Potassium

which explains why liquid becomes gas at boiling point?

Carbon

hexane breaks apart to form compound and element. what is hexane?

chemist adds sulfuric acid to small sample of sodium chloride. which step is this?

Sulfur

convert 5.2 cm to m

Magnesium

subatomic particle of atom with no electrical charge is proton

a neutral gold atom has an atomic number of 79 and mass of 191. How many protons does it have?

calculate avg. atomic mass: 72.2% Rb-85 (84.9u) and 27.8% Rb-87 (86.9 u). round to nearest 0.1

refers to ratio of object's mass to volume

object length measured 4 times: 115 cm, 114 cm, 114.7 cm, 115.3 cm. Actual length 98 cm, is it

What is the relative charge of an electron?

answer 7.4 × 8.030 using sig figs