Atoms 1
Atoms 2
Atoms 3
Atoms 4
Atoms 5
Atoms 6
100
What's in the center of an atom
Nucleus
100
ll What are valence electrons?
Electrons in the outermost shell
100
Atoms have the same element that have different numbers of neutrons?
isotopes
100
An atom’s mass number is 210 and its atomic number is 85. How many neutrons does the atom have?
125
100
Define atom
smallest particle of a substance.
100
Number of Elements not made in the lab.
92
200
What particles surround the nucleus
Electrons
200
What is atomic weight
Number of protons and neutrons
200
Elements that are neither metals nor gasses - simi-conductors
Metalloids
200
What is atomic weight
Number of protons and neutrons
200
What happens when two like charges (Two protons or two neutrons) are placed close to each other?
They get repelled
200
Electrons have this charge
negative
300
What do electrons do in the atom
orbit
300
What is true about the position of all metals in the periodic table?
They are to the left of the zigzag line.
300
Has the symbol Na
Sodium
300
What is the element symbol
abbreviation for the element
300
What happens when two opposite charges (One proton and one neutron) are placed close to each other?
They get attracted
300
Protons have this charge
Positive
400
Which letter is the nucleus?
A
400
What are the 3 parts of an atom
Protons, electrons, and neutrons
400
Has the symbol Ne
Neon
400
What are the 3 parts of an atom
Protons, electrons, and neutrons
400
The periodic table has a lot of information in the form of letters and numbers. Which of the following does each box represent?
An element
400
The periodic table has many boxes. Each box contains one of these.
Element
500
This compound should conduct electricity when placed in water.
What is an ion?
500
The following scientists added negatively charged particles to the model of the atom
JJ Thompson
500
This occurs when a sodium atom forms a positively charged sodium ion.
The atom loses one electron.
500
What is the smallest particle of calcium that has all the chemical properties of calcium?
The Calcium Atom
500
Define ionic bond.
type of chemical bond, which occurs between two ions due to electrostatic force of attraction between the two ions.
500
The smallest part of an element.
Atom
600
Based on the type of bonding shown, this term describes a unit of carbon dioxide.
A molecule
600
What is left of the Zig Zag Line in the PTE?
Metals
600
Which kind of element is most likely used to make semiconductors?
Metaloids
600
In the periodic table below, find the element with the average atomic mass of 87.62.
Sr
600
How are elements arranged in the periodic table?
by increasing atomic number
600
Florine and carbon form a ____________ bond.
Covalent