Atomic Structure
This subatomic particle has a positive charge, is located in the nucleus, and has a mass of 1 amu.
A Proton has a positive charge, is located in the nucleus, and has a mass of 1 amu.
How many protons does an does the element with Atomic Number 15 have?
An element with Atomic Number 15 has 15 protons.
Group 18 is NON-REACTIVE.
What is the direction (up/down or left/right) that Groups go on the Periodic Table?
Groups go UP/DOWN on the Periodic Table.
This is the location in an atom where both protons and neutrons can be found.
Protons and neutrons can be found in the nucleus.
How many electrons does an element have if it has 23 protons?
An element with 23 protons has 23 electrons.
Which two Group numbers on the Periodic Table are HIGHLY REACTIVE?
Groups 1 and 17 are HIGHLY REACTIVE.
What is the direction (up/down or left/right) that Periods go on the Periodic Table?
Periods go LEFT/RIGHT on the Periodic Table.
What subatomic particle has a negative charge and has a very small mass when compared to the other subatomic particles?
An electron has a negative charge and has almost no mass when compared to the other subatomic particles.
What is the atomic number of an element with 78 protons?
The Atomic Number of an element with 78 protons is 78.
What type of electron determines the chemical properties of an atom, such as reactivity?
Valence electrons determine the chemical properties of an atom, such as reactivity.
What does the Group number tell you about an element?
The Group number tells you the number of valence electrons an element has.
What is the charge of a neutron?
A neutron has a neutral charge.
What subatomic particle determines the identify of an element - protons, neutrons, or electrons?
Protons determine the identify of an element.
If an element has 1 valence electron, is highly reactive, reactive, or non-reactive?
If an element has 1 valence electron it is HIGHLY REACTIVE.
What does the Period number tell you about an element?
The Period number tells you the number of energy levels an element has.
What are the three subatomic particles that make up atoms?
The three subatomic particles that make up atoms are protons, neutrons, and electrons.
How many neutrons does an element has if it has an Atomic Number of 25 and a Mass Number of 55?
The element would have 30 neutrons.
If an element has 8 valence electrons, is it highly reactive, reactive, or non-reactive?
If an element has 8 valence electrons, it is NON-REACTIVE.
Are there more metals, non-metals, or metalloids on the Periodic Table?
There are more metals on the Periodic Table.