Periodic Table
Name an element in group 2.
Be, Mg, Ca, Sr, Ba, Ra
Why does Earth get more energy from the sun than from all the other stars in the universe combined?
the sun is much closer than other stars
How many protons does Carbon have?
6
How many carbon atoms does CO2 have?
1
Name the two properties that the electromagnetic spectrum compares.
wavelength, frequency
Name an element in period 4.
K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr
Which classification does the sun fall under?
Main sequence
Giant
Supergiant
White dwarf
Main sequence
Identify the element that has...
13 protons, 13 electrons, 14 neutrons
Al
Give two example of a chemical change.
odor
gas release
bubbles
change in color
change in temperature
Name the wave that carries the least amount of energy.
radio
Based on the physical properties, determine the type of element:
brittle
gas, at room temperature
does NOT conduct electricity well
non-metal
List the following components in order from largest to smallest:
stars, galaxies, nebulae, planet
galaxies, nebulae, stars, planets
What is the mass number of a sulfur that has 17 neutrons?
33
How many atoms are in the products of the equation?
CH4 + O2 ---> CO2 + 2H2O
8
True or false?
The higher the frequency of a wave, the higher the energy that wave carries.
True
Give a characteristic of a metalloid
good conductor of heat electricity
can pass electrical energy easily
can transfer heat easily
For main sequence stars, the luminosity is directly proportional to which characteristic?
surface temperature
Which groups of elements are the most reactive? Least reactive? Why?
group 1, group 18, shells
In which of these compounds are there half as many hydrogen atoms as oxygen atoms?
H3PO4
H2SO4
HClO3
H2O
H2SO4
True or false?
Astronomers can figure out the structure, motion, and composition of a star using telescopes that can detect different wavelengths.
True
Identify the non metal with 7 valence electrons and 17 protons.
Chlorine
What force causes the planets to orbit the sun in an elliptical pattern?
gravitational force
Which element is the most stable? Why?
Nitrogen
Oxygen
Florine
Neon
Neon, noble gas, full outer shell
Calculate the density of a block that has a mass of 100 g and a volume of 20 mL.
5 g/mL
Which correctly orders the EM waves from lowest to highest energy?
A. Radio, micro, infrared, visible, unltraviolet, x-ray, gamma
B. Gamma, x-ray, ultraviolet, visible, infrared, micro, radio
C. Radio, micro, ultraviolet, visible, infrared, x-ray, gamma
A