Atoms, States & Naming Explorer

Chemistry Area 2 SHOULD DO 3 • scenarios + model answers

Matched: 0 / 12   — pick one card, then click its partner (in the other column).
Terms
1
Atomic number
 
2
Mass number
 
3
Isotope
 
4
Isotope notation
 
5
Avg. atomic mass
 
6
Cation
 
7
Anion
 
8
Kinetic energy
 
9
Forces of attraction
 
10
Compound
 
11
Chemical change
 
12
Prefix (naming)
 
Definitions
A
Number of protons in the nucleus; identifies the element
 
B
Protons + neutrons in an atom
 
C
Atoms of the same element, same protons, different neutrons
 
D
Notation showing mass number (top), atomic number (bottom), element symbol
 
E
Weighted average of masses of naturally occurring isotopes of an element
 
F
A positive ion formed when an atom loses electrons
 
G
A negative ion formed when an atom gains electrons
 
H
The energy of motion of particles
 
I
The pulling force between particles that competes with their motion
 
J
A substance made of two or more different elements in a fixed ratio
 
K
A change that recombines atoms into new substances
 
L
Greek-prefix words used to name covalent compounds
 
Quick-Check 1 — Isotope Data & Notation
For each isotope, give protons, neutrons, and electrons, plus notation (mass on top, atomic on bottom).
Carbon-12
p, n, e? notation?
ANSWER
6p, 6n, 6e
126C
Carbon-14
p, n, e? notation?
ANSWER
6p, 8n, 6e
146C
Sodium-23
p, n, e? notation?
ANSWER
11p, 12n, 11e
2311Na
Chlorine-35
p, n, e? notation?
ANSWER
17p, 18n, 17e
3517Cl
Quick-Check 2 — State / Phase-Change Scenarios (model answers)
Identify the state or phase change, then say which KMT factor wins: motion or attraction.
S1
Particles jiggle in place, locked into a fixed structure.
ANSWER
Solid — attraction wins
S2
Particles slide past each other but stay in contact.
ANSWER
Liquid — balanced (motion and attraction)
S3
Particles race far apart and fill the whole container.
ANSWER
Gas — particle motion wins
S4
A solid turns directly into a gas when heated.
ANSWER
Sublimation (energy added) — particle motion gains KE and escapes
S5
Water collects on the outside of a cold glass.
ANSWER
Condensation (energy removed) — attraction wins, particles slow
S6
Steam becomes liquid water after touching a cool window.
ANSWER
Condensation (energy removed) — attraction wins
Quick-Check 3 — Periodic Table, Ions & Diatomics
Classify each element by the staircase, predict the ion it forms, and flag the diatomic ones.
Na
Class? Ion? Diatomic?
ANSWER
Metal, Na+, No
Cl
Class? Ion? Diatomic?
ANSWER
Nonmetal, Cl−, Yes (Cl2)
O
Class? Ion? Diatomic?
ANSWER
Nonmetal, O2−, Yes (O2)
Fe
Class? Ion? Diatomic?
ANSWER
Metal, Fe2+/Fe3+, No
N
Class? Ion? Diatomic?
ANSWER
Nonmetal, N3−, Yes (N2)
Quick-Check 4 — Properties, Changes & Naming
Classify each observation, or name the compound.
1
Copper conducts electricity
ANSWER
Physical property
2
Iron rusts in moist air
ANSWER
Chemical change
3
CO2
Ionic or covalent? Name it.
ANSWER
Covalent — carbon dioxide
4
NaCl
Ionic or covalent? Name it.
ANSWER
Ionic — sodium chloride
5
Water boils at 100 °C
ANSWER
Physical property