Physical Science Chapter 17

the particles that move about the nucleus and have a negative charge are

electrons

Substance with atoms that are all alike

element

Vertical column in the periodic table

group

vertical columns of elements are called

groups

have either fewer or more electrons than regular atoms

ions

Atoms of the same element that have different numbers of neutrons-

isotopes

atoms of the same element but with different numbers of neutrons are

isotopes

Sum of the number of protons and neutrons in an atom's nucleus-

mass number

a total count of the neutrons and protons in an atom is the

mass number

elements that have some properties of both metals and nonmetals are

metalloids

Most of the elements on the periodic table are

metals

elements that are found on the left side of the periodic table are

metals

-Neutral particle composed of quarks inside the nucleus of an atom

neutron

neutral particle

neutron

.Most of the mass of an atom is found in its-

nucleus

The center of an atom where protons and neutrons are located is the

nucleus

positively charged center of an atom

nucleus

On the periodic table nonmetals are found-

on the right

Horizontal row in the periodic table

period

.Elements that are arranged and increasing atomic number and by changing in chem and phys properties

periodic table

a chart that shows the classification of elements is called the

periodic table

The horizontal rows of elements are called

periods

An atom that has lost one or more electrons will become a

positive ion

Particle composed of quarks inside the nucleus of an atom that has a charge of +1

proton

positively charged particle

proton

How many different types of quarks are there and what is the name of one

6. top quark

The second electron shell in an atom can fit

8

Why has the atomic model changed over time?

Aristole's theory was incorrect and was accepted for about 2,000 years. In the 1800's John Dalton was able to prove that atoms could exist. As new discoveries and new elements are discovered the model has changed.

How is the chemical symbol of an element determined?

Elements have been named in a variety of different ways. Some symbols came from Latin.Some are named in honor or famous scientists/people,places,or for their properties.

Remember to get 1,000 points on zondle . This quizlet is on all of the worksheets, kahoot and vocab. You can use the yellow sheet and periodic table on the test.

Hope this helps :)

How are ions different from regular atoms?

It has more or fewer electrons than protons

why is the current atomic model called the "Electron Cloud Model'?

It is the area around the nucleus of an atom where its electrons are most likely found. The elctron cloud is 100,000 times larger than the diameter of hte nucleus.

Are protons, neutrons, or electrons the smallest particles?If not, what are?

No, but protons and neutrons are made up of small particles called quarks. Electrons are not copmposed of smaller particles.

What are atoms composed of

They are composed of particles called protons,neutrons,and electrons

in what way can atoms of an element be different from each other?

They can have different numbers of neutrons and electrons

Why do scientists use models to study atoms?

They use models to represent things that are difficult to vsiualize. Atoms are too small to be seen.

Who created the periodic table

a Russian chemist, Dimitri Mendeleev

The smallest particle of an element that still retains the properties of the element is the

atom

the number of protons+neutrons =______

atomic mass

number of neutrons=_________________

atomic mass-atomic number

number of electrons in a neutral atom =

atomic number

number of protons=

atomic number

the number of protons in an atom is the

atomic number

.Adding up all the masses of a sample of atoms and dividing by the number of atoms-

average atomic mass

an average of the masses of all the isotopes that occur in nature for an element is the

average atomic mass

A capital letter or a combination of a capital letter and a small letter that is used to represent an element is called a

chemical symbol

Particles surrounding the center of an atom that have a negative one charge

electron

negatively charged particle

electron

Area around the nucleus of an atom where the atoms electrons are most likely found

electron cloud

the region around the nucleus occupied by electrons is an

electron cloud

atomic number =_______=______

protons,electrons

protons and neutrons can be subdivided into ____ by colliding them

quarks

smaller particles that make up protons and neutrons

quarks

what makes atoms of one element different from the atoms of other elements

the amount of protons

In what way are all of the atoms of an element identical?

they all have the same number of protons

elements in the middle of the periodic table,groups 4-7, are called the

transition elements