C1-atomic Structure And Peroidic Table Flashcards
What is the smallest unit of an element?
Atom
True or False: Electrons have a positive charge.
False
What are the three main subatomic particles?
Protons, neutrons, and electrons
Fill in the blank: The atomic number of an element is determined by the number of __________ in its nucleus.
Protons
Which particle has a negligible mass compared to protons and neutrons?
Electron
What is the charge of a neutron?
Neutral
What is the mass number of an atom?
The total number of protons and neutrons in its nucleus
In which part of the atom are protons located?
Nucleus
True or False: Isotopes of an element have the same number of protons but different numbers of neutrons.
True
What is the periodic table?
A tabular arrangement of elements based on their atomic number and properties
Which group of the periodic table is known as the alkali metals?
Group 1
What is the general trend of atomic radius across a period?
It decreases from left to right.
Fill in the blank: Elements in the same group of the periodic table have similar __________.
Chemical properties
What do we call the vertical columns in the periodic table?
Groups
What do we call the horizontal rows in the periodic table?
Periods
Which element has the atomic number 1?
Hydrogen
True or False: Noble gases are highly reactive.
False
What is an ion?
An atom or molecule that has gained or lost one or more electrons, resulting in a net charge.
Which subatomic particle determines the identity of an element?
Proton
What is the electron configuration of a neutral carbon atom?
1s² 2s² 2p²
What type of bond forms when electrons are shared between atoms?
Covalent bond
Fill in the blank: The __________ is the region around the nucleus where electrons are likely to be found.
Electron cloud
What is the primary characteristic of metals in the periodic table?
They are good conductors of heat and electricity.
What is the significance of the atomic mass unit (amu)?
It is a standard unit used to measure the mass of atoms.
True or False: The periodic table is organized by increasing atomic mass.
False
What are transition metals?
Elements found in groups 3-12 of the periodic table that have variable oxidation states.
Which element is considered the most electronegative?
Fluorine
