Stars
What is the main factor that determines a star's life cycle?
Mass
What property of an object does density depend on?
Mass and volume
What is the charge of a proton?
positive (1+)
Groups and periods go
groups go up and down, periods left and right
Ionic bonding has what two types of elements
metal and nonmetal
How are high-mass stars different from low-mass stars in terms of their life cycles?
high mass stars burn faster
What is the denistry of a object is the mass 10g with a volume 5mL?
2g/mL
What are the three particles of the atom?
protons, electrons, neutrons
Which family includes elements essential for living things, like carbon and nitrogen?
nonmetals
What type of bond forms when electrons are transferred from one atom to another?
ionic
Which of the following stars will our Sun become at the end of its life?
white dwarf
What is the volume if the mass is 5g and has a denistry of 30g/mL
6mL
What is the symbol for the element with atomic number 26?
Fe (iron)
What is the name of the family that includes fluorine, chlorine, and bromine?
Halogens
What particles have a negative charge in ionic bonds?
Anions
What causes a star to become a white dwarf?
The fusion of helium into carbon
What is the density of an object with a mass of 25g if the volume started at 10mL but rose to 20mL?
2.5g/mL
Atomic number tells us the number of
protons
Most reactive metals are
alkali metals
Which of these is an example of an ionic compound?
a. Water (H₂O)
b. Table salt (NaCl)
c. Carbon dioxide (CO₂)
d. Methane (CH₄)
KI
How are heavy elements created?
Supernova
How do you calculate displacement?
object displaces the volume, you subract the initial - the final to calculate volume displaced
How many neutrons are in potassium (K)
20
Ionic compounds are more conductive when they dissolve well in water because:
into ions
List the three properties of metals
High conductivity,
High melting and boiling points
lattice crystal and shiny