Scientists
Which of the following was one of Dalton's ideas?
A: All substances are made of atoms B: Atoms can be divided C: Atoms can be destroyed D: some substances are made of atoms
What is : A: All substances are made of atoms
The number of protons in an atom of an element is its _________.
What is : atomic number
This type of group is found on the left side of the stair step on the periodic table. They are solid at room temperature except for mercury.
What is: Metals
What is the element based on this electron configuration?
1s2 2s2 2p6 3s1
What is: Na/Sodium
What is the symbol for the element Tin?
What is: Sn
A (n) _____ is a very small particle that is the basic unit of matter.
What is: Atom
What structure did Rutherford discover was in an atom after his gold foil experiment?
What is : A nucleus
The positively charged particle is called a ____________.
What is : A proton
Which group of metals are the most reactive?
What is: Group 1/Alkali metals
Write the electron configuration for Neon.
What is: 1s2 2s2 2p6
The total number of protons and neutrons in an atom.
What is: atomic mass/mass number
How many energy levels or "shells" does an oxygen atom have - based on the Bohr model?
What is: 2 levels/shells
What particle did J.J. Thomson discover?
What is : electron
The neutral charged (no charge) particle is called a ___________
What is : neutrons
Non-metals can be found in __________________ at room temperature.
What is: solid, liquid or gas
What is the element for this electron configuration?
1s2 2s2 2p6 3s2 3p4
What is: Sulfur
What is the atomic number and symbol for Silver?
What is: 47 ; Ag
Metals are _________ of electricity and heat.
What is: good conductors
The plums in Thomson's plum-pudding model of the atom represent:
What is :electrons
_______________ are in the center of the atom's nucleus and the ____________ are on the outside of the atom.
What is: Protons and Neutrons; Electrons
Groups are organized ______________ on the periodic table.
A. Horizontally B. Vertically
What is: Vertically
Write the electron configuration for Phosphorus.
What is: 1s2 2s2 2p6 3s2 3p3
How many electrons does an oxygen atom have?
What is: 8 electrons
Is this the correct way to write the electron configuration?
1s2 2s2 3s2 3p8 2p1
What is: No/False
What did Bohr, Thomson, Dalton, and Rutherford all have in common?
A: They each identified the electromagnetic force of atoms B: They each identified new electron clouds C: They each developed ideas about atoms D: They each conducted experiments with ions
What is: C:They each developed ideas about atoms
Describe the difference between atomic number and mass number.
What is: The atomic number is the number of proton in an atom. The Mass number is the sum of the number of protons and neutrons in an atom.
Metalloids share similar properties of both ____________ and ___________.
What is: Metals; Non-Metals
What is the element for this electron configuration?
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p5
What is: Iodine
Which determines the identity of an element?
A) Its mass number B) The charge of the atom C) The number of its neutrons D) The number of its protons
What is: The number of protons
Metals are ___________, meaning that they can drawn into a thin wire.
What is: ductile