Question 1

Why memorize the periodic table?

Accepted Answer

The periodic table is the foundation of chemistry. Knowing element symbols, atomic numbers, and group properties helps with chemical equations, bonding, and understanding reactions. Fast recognition is especially useful in chemistry courses and labs.

Question 2

What is atomic number?

Accepted Answer

The atomic number is the number of protons in an atom's nucleus. It uniquely identifies each element · Hydrogen is 1, Helium is 2, and so on. The periodic table is arranged by atomic number.

Question 3

What is a group?

Accepted Answer

Groups are vertical columns in the periodic table. Elements in the same group share similar chemical properties because they have the same number of valence electrons. For example, all alkali metals are in Group 1.

Question 4

What is a period?

Accepted Answer

Periods are horizontal rows in the periodic table. The period number tells you how many electron shells an atom has. Period 1 elements have 1 shell, Period 2 elements have 2 shells, and so on.

Question 5

How does difficulty work?

Accepted Answer

Difficulty 1-3 focuses on the first 20 elements · the most common ones. Difficulty 4-6 expands to the first 50. Difficulty 7-10 includes all 118 elements, including rare transition metals and lanthanides.

Question 6

What if I get it wrong?

Accepted Answer

The round ends and the correct answer is revealed. You see the element on the periodic table so you learn its position and properties.

Question 7

Can I play offline?

Accepted Answer

Yes. PlayMemorize is a Progressive Web App. Once installed, Periodic Table Master works without an internet connection.

Question 8

How does my progress save?

Accepted Answer

Your best streak per (element range, difficulty) combination is stored locally in your browser. Mastering the first 20 elements keeps its own record separate from the full 118. Sign in to sync the same records across phone, tablet, and desktop.

元素周期表