Atoms
What is a proton?
A positively charged subatomic particle found in the nucleus
What is an element?
A pure substance that cannot be broken down into simpler substances throug ordinary chemical reactions
What is an alloy?
An alloy is a metallic substance made by combining two or more chemical elements, where at least one is a metal
What does PPE stand for?
Personal Protective Equipment
What is an independent variable?
The variable in a graph that is intentionally changed by the researcher
Who first conceptualized the concept of an atom?
Democritus
What is the chemical symbol of Silver?
Ag
Is 18 Karat Gold a pure metal?
No, it is an alloy (75% Gold, 25% Other elements)
Why is PPE important?
PPE heavily reduces the chances of exposure incidents, injuries, skin damage, respiratory illness, etc
What is usually placed on the X-axis of a graph?
The independent variable
Electrons orbit the nucleus in a fixed, circular path, True or False?
False, the movement of electrons is much more complicated, as they exist as both particles and waves
What is the primary property of chemicals of Groups 1 and 7?
Reactivity
Name three benefits to using alloys over pure metals
Durability, rust-resistance/corrosion-resistance, enhanced heat conduction, enhanced water resistance, enhanced heat resistance, etc
What is the most important thing to do in school Science Lab settings?
Pay attention to teacher instructions
Graphs are used to __________.
Atoms emit light because _______
The electrons during excited state jump back to a stable shell, and emit excess energy in the form of photons
A neutral atom of Arsenic contains how much protons, neutrons and electrons?
The Atomic Weight is 74.922
The Atomic Number is 33
Protons: 33
Neutrons: 42
Electrons: 33
What is the only pure metal that exists in a liquid state at room temperature?
Mercury