Atoms
What is a is a proton?
A stable subatomic particle found in the nucleus
What is a element?
A pure substance tht cannot be broken down into a simpler substance by ordinary chemical reactions.
What is an alloy?
The combination of two or more substances with one being a metallic substance.
What is PPE?
Personal protective equipment
What is the independent variable?
A factor of an experiment that is intentionally controlled or changed by a researcher to observe its affect?
Who first concepted the idea of atoms?
Democritus
What is the chemical symbol of silver?
Ag
Is 18 karat gold a pure metal?
No, it an alloy.
Why is PPE is important?
PPE reduces the likeliness of, exposure to harmful chemical, possible burning, skin damage or respirtory illnesses.
What is usually placed on the X-axis of a graph?
The independent variable.
False
What are the simillar properities of chemical groups 1 and 7?
Their exterme reactivity.
Name three benefits to using alloys over pure metals
Alloys are stronger/durability, rust-resistance and better heat conductors, enhanced heat resistance, enhanced water resistance.
What is the most important thing to do in a school science practical?
Organize scientific data in a visual format.
Atoms emit light because __________
The electrons during excited state, jump back to a stable 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 the only pure metal that exists in a liquid state at room temperature?
Mercury