Properties of Atoms and the Periodic Table

Which of the following is the correct chemical symbol for carbon?

• Ca

• Crbn

• Car

• C

The discovery of the sixth quark was accomplished by ______.

• experimenting with a cathode ray tube

• using teh Hubble Space telescope

• studying proton collisions

• bombarding gold foil with alpha particles.

Atoms consist of a positively charged center called an (n) ____.

• electron

• proton

• nucleus

• neutron

Tags

NGSS.MS-PS1-1

Scientists have broken down protons and neutrons into smaller particles called _____.

• vacuoles

• quarks

• isotoes

• nuclei

Aristotle believed that matter was _____.

• uniform throughout

• capable of being broken down into smaller parts

• cmplosed of atoms

• composed of molecules

Democritus believed that the universe was made of empty space and _____.

• molecules

• elements

• atoms

• compounds

A(n)________ is a method of representing atoms and the electrons in their outer energy levels.

• electron dot diagram

• chemical formula

• chemical symbol

• chemical equation

The ______ is a chart created by scientists to organize the elements according to repeated changes of the properties.

• isotope

• periodic table

• metalloid list

• mass number

The mass of proton is measured in ____.

• atomic mass units

• microns

• minutiae

• nanograms

Who formed the first periodic table?

• Dalton

• Moseley

• Democritus

• Mendeleev