What is matter?
This term describes anything that has mass and takes up space.
What is matter?
Observations that involve numbers or measurements are called this.
What are quantiative observations?
The change from liquid to gas is a ____ change.
What is a physical change?
These are the vertical columns in the periodic table.
What are groups (or families)?
A charged particle formed when an atom gains or loses electrons.
What is an ion?
This state of matter has a fixed shape and volume.
What is solid?
The amount of space an object occupies is called its __________
What is volume?
Oil & Water is this type of mixture
What is heterogeneous?
The group that contains highly reactive metals like sodium and potassium.
What are alkali metals (group 1)?
The number of protons in the nucleus of an atom determines this.
What is the atomic number?
What is gas?
Observing that a solution is forming bubbles is what kind of observation?
What is qualitative?
You hear a popping sound in the lab. What does this indicate?
What is a chemical change?
Elements in this group are known for being non-reactive and are called "noble".
What is group 18?
What we call atoms of the same element that have different number of NEUTRONS.
What are neutrons?
The smallest unit of matter that retains the properties of an element
What is an atom?
An instrument used to measure mass in grams or kilograms.
What is a scale/balance?
Cutting paper into pieces is an example of this type of change.
What is a physical change?
This element is the lightest and placed in Group 1 but is not an alkali metal.
What is hydrogen?
When an atom _______ an electron (-), it becomes a POSITIVE ion.
The particles in a substance are _______ to one another
What is attracted?
The formula for density
What is d = m/v ?
You notice a solid forming at the bottom of your test tube. This is an example of a _______ change.
What is chemical?
In each period (horizontal row) the _____________ increases from left to right.
What is the atomic number?
When an atom _______ an electron (-), it becomes a NEGATIVE ion.
What is GAINS?