Metals, Non-Metals, or Metalloids?
This type of element is shiny, malleable, and a good conductor of heat and electricity.
Metal
This subatomic particle, discovered by Ernest Rutherford, carries a positive charge and contributes to the atom’s mass while residing in the dense central core of the atom.
Proton
This is the term for the temperature where a solid turns into a liquid.
Melting Point
What is the density of water in g/cm3?
1 g/cm3
This metal is essential for blood but can be toxic in large amounts.
Iron
These elements have properties of both metals and non-metals. They're often used in semiconductors.
Metalloids
An atom has 11 protons, 12 neutrons, and 11 electrons. What element is it?
Na (Sodium)
Pure substances have a consistent melting point. What happens to mixtures?
Range of melting points
Often used in both chemistry labs, this device determines the amount of matter in an object, and is calibrated using standard units like grams or kilograms.
Digital scale or balance
Give an example of an element used in wiring and can cause environmental harm if not recycled properly?
Metal (e.g., copper)
This group of elements tends to be brittle and poor conductors.
Non-metals
This atom has an atomic number of 8 and 8 electrons. Name the element.
O (oxygen)
On a graph of temperature vs. time, this line represents a phase change.
plateau
Two solid cubes have identical volumes, but one has a greater mass. Based on the relationship between mass and volume, this cube has the higher value of THIS physical property.
density
Suggest one safe and cost-effective way to use or dispose of a non-metal.
proper recycling or containment for chemicals like chlorine
Using data from an experiment, a student observes dullness, brittleness, and low conductivity. What kind of element is this?
Non-metal
A model of an atom shows 6 protons, 6 neutrons, and 6 electrons. Identify the element.
Carbon
When comparing boiling points of salt water and pure water, which one boils at a higher temperature and why?
Salt water; The presence of salt (or any solute) in water causes boiling point elevation due to more heat required to break molecules.
This is the number of cubic centimeters in one cubic meter.
1,000,000 cubic centimeters
A company uses silicon (a metalloid) in electronics. How does this affect the economy?
boosts tech production and jobs but requires resource management
Boron is used in high-tech devices. Based on its properties, what type of element is it?
Mettaloid
A student draws a model with 17 protons, 18 neutrons, and 17 electrons. What is it and is it neutral?
chlorine (Cl); it is a neutral atom
This common metal has a boiling point of approximately 2,700°C, making it useful in high-temperature industrial processes.
Aluminum
To find the volume of an irregular object, what object do we use?
Eureka can
What is the result of recycling old electronics to extract usable metals?
safe and cost-effective method for reducing the harmful impact of using rare earth metals