Elements, Compounds & Mixtures
True or False: An element CANNOT be separated into simpler parts.
True
Elements that have properties of both metals and nonmetals are called what?
Metalloids
A table in which all the known elements are arranged by properties and are represented by one- or two-letter chemical symbols?
Periodic Table of Elements
What goes in the up and down direction on the periodic table?
Group or Period
If an element has a charge of 0 and 3 protons, how many electrons does it have?
3
Is the following an element or compound: Kr
Element
Elements that are typically not shiny, not malleable, and poor conductors of heat and electricity; usually gases or brittle solids.
Non-metals
Is the following describing Metals, Nonmetals, or Metalloids?
To the left of the stair step (except for H).
Metals
Fill in the blank: ____________ is anything that has volume and mass.
Matter
If an element has an atomic mass of 15 and 9 protons, how many neutrons does it have?
6
What is a pure substance with two or more elements; a compound or a mixture?
Compound
Elements that are typically shiny, malleable, and good conductors of heat and electricity; usually solids.
Metals
Is the following describing Metals, Nonmetals, or Metalloids?
To the right of the stair step (Except for H).
Nonmetals
The number of protons is equal to ____________
a. the number of electrons
b. the atomic number
c. the name of the element
b. the atomic number
If an atom has 5 protons, 7 neutrons, and 6 electron; what is the charge?
5-6 = -1
Fill in the blank: A mixture is two or more ________ or _______ not bonded.
Elements / Compounds
A characteristic that can be observed or measured (examples: color, melting point, and conductivity) is what; a physical or chemical property?
Physical
Is the following describing Metals, Nonmetals, or Metalloids?
On or touching the stair step (except for Al).
Metalloids
What parts of an atom are in the nucleus? (There can be multiple answers)
- Proton
- Neutron
- electrons
Proton & Neutrons
If an atom has 5 protons, 7 neutrons, and 6 electron; what is the Atomic mass?
5 + 7 = 12