Elements
What is it called when 2 or more elements mix to create something new?
A Substance
_______________ is one way to determine a chemical change has occurred.
Burning or rusting.
The atomic number is the number of _________ in an atom of an element.
What is protons?
If Areli is conducting an experiment on magnets and the numbers she gets are strange and not what she expected, what should Areli do next?
Redo the experiment.
A block of oak wood floats when it is dropped into water. What is the woods density, relative to the water?
It is less dense
Would sugar (C6H12O6) be considered an element, a compund, or a substance, why?
A compound because it is made of multiple elements.
Describe the structure of an atom and where the particles are located.
Protons & neutrons in the nucleus and the electrons on the outside.
The columns on the periodic table are known as _________.
What are groups/families?
If Brian were to take a spaceship to the moon, what would change about him?
His Weight
You have a rock with a volume of 15 cm 3 and a mass of 45 g. What is its density?
3g/cm3
Name 3 types of elements.
What are metals, metalloids, and nonmetals?
How is oxygen, hydrogen, and water classified?
Water is a compound, hydrogen and oxygen are elements.
Groups within the periodic table are organized which way?
In column's and with similar properties
Why would the earths crust float on top of the magma within the earths mantle?
The crust is less dense than the liquid mantle.
an object has a mass of 10g, and a volume of 15mL. What is its density?
.66g/mL
Why would water drops form on the lid of a pot of boiling water?
The lid was cooler than the boiling water
The the left of the zig zag line, you will find what type of elements
What are metals
At room temperature, hydrogen is a gas and gallium is a liquid. How do the particles of hydrogen gas compare to the particles of liquid gallium?
The hydrogen gas is moving more quickly
An object has a volume of 50mL, and a density of 3g/mL. What is its mass?
150g
Group 18 elements are nonmetals called _____________.
Noble Gasses
Why would dissolving salt into a glass of water be considered a physical change?
Because the mixture of salt and water retain their original properties.
Which two elements on the periodic table are in the same period?
A. Be and Mg
B. Mt and Ni
C. K and Ca
D. F and Cl
What is the one thing that solids, liquids, and gases all have in common?
The particles in all phases of matter are constantly moving.
An object has a mass of 200g, and a volume of 120mL. What is its density, and if it were placed in water would it float or sink?
1.66g/mL; sink