Elements, Mixtures and compounds
The smallest unit of matter which has properties of a chemical element.
What is an atom?
What is the chemical name for symbol Ni?
Nickel
The subatomic particles (the parts of an atom.)
What are protons, neutrons, and electrons.
Matter can neither be _____________ nor ______________.
What is created, destroyed OR made, lost.
This tells the number of protons in an atom.
What is the atomic number?
NaCl is classified as this.
A compound.
The atomic number of Carbon?
6
The inner part of an atom, composed of protons and neutrons.
What is the nucleus.
A researcher uses several procedures to separate a rock sample into different chemicals. A mass of 50 grams of one chemical is produced. If this chemical cannot be separated into other chemicals (by physical or chemical means), then it is BEST described as...
an element
Anything that has mass and takes up space is a kind of
What is matter?
Hydrogen and Neon are examples of what state of matter at room temperature.
What is a gas?
The number of protons in Calcium?
20
The charge of an electron.
What is negative.
The number placed below after a symbol in a chemical reaction is called
What is a subscript?
How would you classify gold?
Element
Soil and air are examples of what type of material.
What are mixtures?
The atomic weight of Lithium to the nearest hundredth.
6.94
The charge of a neutron.
What is no charge or neutral.
Where are the most reactive nonmetals located on the periodic table?
Group 17/Halogens
Spaghetti and meatballs is an example of a:
heterogeneous mixture
How could you isolate salt from sea water?
What is heat it, boil it or let it evaporate. (Any one of these are correct!)
How many valence electrons does Oxygen have?
6
Atoms share these when they bond.
What are electrons?
Elements in the same column of the periodic table of the elements all have this...
similar properties
Which is more reactive? Alkali Metals or Alkaline Earth Metals?
Alkali Metals