Periodic Table
What number on the periodic table tells how many protons and atom has?
Atomic number
What is matter?
Anything that has mass and takes up space
If two objects have the same volume but one has more mass, which has the greater density? If you can explain why I'll add 100 points.
The one with the greater mass
What is the smallest unit of matter that keeps the properties of an element?
Atom
Density is what type of property?
Physical property
What information on the periodic table shows the average mass of an elements atoms?
Atomic mass
Is air considered matter?
yes
What formula is used to calculate density?
Density = mass/volume
What forms when atoms chemically bond together?
Molecule
Flammability is what type of property?
Chemical property
Why do elements in the same column often behave similarly?
They have similar chemical properties/same valence electrons
Is a shadow matter?
no
What tool is used to measure liquid volume?
Graduated cylinder
Water (H20) is an example of what type of substance?
Compound
Melting point is what type of property?
Physical property
A scientist needs a nonreactive gas to store a chemical safely. What type of elements should they use?
Noble gases
Is helium matter?
yes
How can you measure the volume of an irregular object like a key?
water displacement
Iron and salt mixed together form what type of substance?
Mixture
Reactivity with oxygen is what type of property?
Chemical property
Copper is often used in pipes because it is strong and not very reactive. Why is this useful?
It prevents corrosion and damage
Name something that is visible, but not matter.
a rainbow, light, shadow
The water level rises from 25 mL to 37 mL when an object is placed in water. What is the object's volume?
12 mL
Why can mixtures be separated by physical methods?
The substances are not chemically bonded.
What is the difference between a physical property and a chemical property?
Physical properties can be observed without changing the substance. Chemical properties describe how a substance reacts or changes