Stars pt.1
Stars pt.2
Density
Electromagnetic Spectrum
Chemistry
100

What does every life cycle of a star start out as?

Nebula

100

What stage is our sun in right now?

main sequence 

100

When will something sink or float in water? In other words, what does it depend on?

the density of the object

100

What is wavelength and what are its units?

the distance from one crest to the next and meters (m)

100

What subatomic particle is responsible for forming ions? For isotopes?

electrons

neutrons

200
What is the definiton of nucleosynthesis?

the creation of a nucleus (synthesis: the creation of; nucleo: nucleus)

200

What is the definition of nuclear fusion?

Two or more atoms coming together to form one atom of a different element

200

What are the units of mass, volume, and density?

Mass: g

Volume: mL, cm3

Density: g/mL; g/cm3

200

What is the most dangerous/radioactive wave on the spectrum?

gamma rays

200

Of the three types of chemical bonds (ionic, covalent, & metallic), NaCl is a ________ bond.

ionic

300

Where does the hydrogen fusion begin in the life cycle? Remember: has to reach 10mil degrees Kelvin

protostar / main sequence

(protostar reaches 10mil degrees and starts fusion, then becomes classified as a main sequence star)

300

A low mass star fuses up to the element ______; 

a high mass start fuses up to the element _______;

carbon

iron 

Note: anything past iron is made from explosions of supernovas

300

Calculate the density of a liquid that has a mass of 28.4 g and a volume of 6.2 mL.

4.58 g/mL

300

If something has high energy, describe the wavelength and the frequency.

short wavelengths, high frequency

300

Name 3 of the 5 families of the periodic table

alkali metals, alkaline earth metals, transition metals, halogens, noble gases

400

Name the order of the low mass (sun-like) star life cycle

Red giant - planetary nebula - white dwarf - black dwarf

400

Name the order of the high mass (massive) star life cycle

red supergiant - supernova - neutron star or black hole

400

What is the volume of a marble that has a mass of 43g and a density of 32 g/mL?

1.34 mL

400

What type of wave from the electromagnetic spectrum has to do with heat?

infrared

400

How many valence electrons does C, Br, and Mg have respectively?

4, 7, 2
500

Give a brief summary/description of what happens in a high mass (massive) star life cycle...

red super: burns elements up to Fe, then explodes into a supernova

supernova: creates elements heavier than iron

neutron star: supernova core is 1.5-3 solar masses

black hole: supernova core is >3 solar masses; nothing can escape it

500

Give a brief summary/description of what happens in a low mass (sun-like) star life cycle...

red giant: helium fusion, star expands

planetary nebula: results from outer layers of red giant blown off

white dwarf: remaining core that hasn't drifted off

black dwarf: a white dwarf with no fuel/heat

500

A rock with the density of 2.85 g/mL is placed into a graduated cylinder with 70 mL. The rock displaces 10 mL, what is the mass?

28.5 g

500

List the waves of the spectrum in order from longest wavelength to shortest...

visible light, microwaves, radio, ultraviolet, gamma rays, infrared, x-rays

radio, microwaves, infrared, visible light, ultraviolet, x-ray, gamma ray

500

Determine the number of the subatomic particles (protons, electrons, & neutrons) of...

Calcium-43 

*hint* Ca has atomic number of 20

protons = 20

electrons = 20

neutrons = 43