Subatomic particles
This subatomic particle has a mass of 1 amu, is located in the nucleus of an atom, and has no charge
What is a Neutron
What this "stairstep" line on the periodic table is home to
What are metalloids
Shifting phases of matter (such as liquid to solid) is an example of what kind of change
What is a physical change
This element has an atomic number of 77
What is iridium
This refers to the horizontal rows on the periodic table
What are periods
This subatomic particle is negatively charged and has a mass of less than 1 amu
What is an electron
Elements from this category typically are shiny in appearance or have high luster
What are metals
Smell, precipitate, and heat are all indicators of what kind of change
What is a chemical change
This element has an atomic number of 82
What is lead
This refers to the vertical columns on the periodic table
What are groups
Hydrogen is the only element on the periodic table without any of this subatomic particle
What are neutrons
Another word for being able to transmit electrical and thermal energy
What is conductivity
Ductility, malleability, and melting point are all examples of what kind of properties
What are physical properties
This element is a metalloid that has fewer protons than aluminium
What is boron
The ___ number tells you how many electron shells an element has
What are periods
When you add these two subatomic particles together, you get an atom's mas number
What are neutrons and protons
This category of element on the periodic table is categorized as being brittle, dull, and an insulator
What are non-metals
The formula for density
What is d = m\v
This element is the only non-metal in group 1 on the periodic table
What is hydrogen
Currently there are ___ known elements
What is 118
The number of this subatomic particle is what determines the element it is, also known as the atomic number
What are protons
Another word for being able to be stretched into a thin wire, metals are known for being this
What is ductility
Substances in this phase of matter have atoms that are loosely packed and take the shape of their container
What is liquid
This element is a metal with 2 valence electrons and 3 electron shells
What is Tungsten (W)
Potassium is in ____ , so a potassium atom has 1 valence electron
What is group 1