Skills Flashcards
How many neutrons does Hydrogen have?
0
What are protons, neutrons and electrons?
Subatomic Particle
How many times smaller is an electron than a proton or neutron?
1836
What’s the difference between mass number and atomic mass?
The mass number is the number of protons + neutrons in an atom, and atomic mass is the average of all the isotopes of the element.
What’s radioactivity in atomic theory?
Atomic Decay - Alpha Decay (loses 2 protons and neutrons), Beta Decay (In beta-minus, a neutron breaks into a proton and electron. The electron is emitted, and the proton stays. In beta-plus, a proton breaks into a neutron and positron. The positron is emitted, neutron stays) and Gamma Decay (Energy as gamma rays are emitted)
What are radioisotopes?
An atom with an unstable nucleus - it goes through radioactive decay.
Traits of metals
Ductile, Malleable, lustrous, good conductors
Traits of non-metals
Opposite of metals, brittle, dull
Positive atoms and negative atoms are called…
Cations and Anions, respectively.
What’s validity?
How well the experiment addresses the aim of the experiment
What’s the variable changed on purpose?
Independent variable
What’s the variable you measure?
Dependent variable
What to compare results to?
Control
What stays the same?
Controlled variables
What are all the things that may change in the experiment?
Experimental variables
