Atoms with same number protons & different number neutrons

What do we use half-lives for?

Dating the age of a sample of Matter.

Why are Alkali Metals not found as pure substances in nature?

They are very reactive and chemically combine with others.

Show the steps of chemical reactions.

What part of Atomic Theory did Thompson discover?

Atoms are made of negative & positive charges to cancel out

The average of mass numbers of an element‘s isotopes

What is the Atomic Number?

The number of protons in an atom.

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Atoms and Periodic Table

30 termsStudBud Administration294 plays

A #science quiz about #periodictable and #atoms

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Questions 30

Answers

1
What is an isotope?
Atoms with same number protons & different number neutrons
Radioactive nucleus that emit gamma rays
A molecule made of two atoms of the same element
A particle made of two protons and two neutrons
2
What is a negatively charged particle circling the nucleus?
Electron
Proton
Neutron
Nucleus
3
What are the MOST reactive Nonmetals?
Halogens
Noble Gases
Alkali Metals
Alkaline Earth Metals
4
Beta particle resembles—
A helium nucleus
An electron
An X-ray wave
A hydrogen nucleus
5
What do we use half-lives for?
Destroy cancer cells.
As Fuel for power plants.
Dating the age of a sample of Matter.
Tracing the steps in a chemical reaction.
6
What is a gamma ray?
A fast moving electron.
A positively charged particle
Two protons and two neutrons
High energy waves
7
Who discovered the atom has a dense, positive nucleus surrounded by mostly empty space?
Thompson
Bohrs
Dalton
Rutherford
8
Which group of metals is good for use in jewelry and industrial processes?
Alkali Metals
Lanthanide Series
Alkaline Earth Metals
Transition Metals
9
What is the basic particle from which all matter is made?
Molecule
Element
Atom
Compound
10
What element is the most abundant in the universe, and makes up stars?
Flourine
Hydrogen
Carbon
Oxygen
11
Which element is necessary for all life on Earth, and provides fuel for most processes?
Oxygen
Hydrogen
Carbon
Flourine
12
Why are Alkali Metals not found as pure substances in nature?
They are too soft to survive as pure substances.
They are very reactive and chemically combine with others.
They are radioactive and break down in nature.
They don’t react with other substances, so stay compounds
13
What do tracers do?
Provide fuel for power plants
Help scientists date samples of Matter.
Show the steps of chemical reactions.
Power fireworks
14
What elements do not normally react with other elements?
Noble Gases
Transition Metals
Halogens
Alkali Metals
15
What increases as you move from left to right across the Periodic Table?
Reactivity
Atomic Number
Radoiactivity
Melting point
16
Which process turns thorium-234 to protactinium-234?
Beta decay
Alpha decay
Gamma radiation
Corrosion
17
What part of Atomic Theory did Thompson discover?
A solid nucleus made of ONLY protons
Electrons circle the nucleus like planets orbit the sun
Electrons circle the nucleus in a cloud.
Atoms are made of negative & positive charges to cancel out
18
Atomic mass is—
The number of electrons in an atom.
The number of protons in an atom.
The average of mass numbers of an element‘s isotopes
The sum of protons and neutrons in a nucleus.
19
What is a property of metalloids?
Ductile
Highly reactive
Malleable
Brittle
20
What is the arrangement of elements in a chart to show the repeating pattern of properties?
The Periodic Table
Isotopes
Radioactive Elements
Atomic Theory
21
What is NOT a property of metals?
Electrical conductivity
Brittle
Ductile
Malleable
22
What is an example of corrosion?
Rusting
Beta decay
Melting
Alpha decay
23
What is the ability to be hammered into flat sheets or other shapes?
Thermal conductivity
Luster
Ductile
Malleable
24
Alpha particles resemble what?
A hydrogen nucleus
A helium nucleus
An X-ray wave
An electron
25
Which group are used as semiconductors?
Metalloids
Metals
None of the above
Nonmetals
26
What is the deterioration of metal due to chemical reaction in the environment?
Corrosion
Radioactivity
Thermal Conductivity
Reactivity
27
What group loses electrons during chemical reactions?
Metalloids
All elements
Metals
Nonmetals
28
What is the MOST reactive group of metals?
Noble Gases
Alkali Metals
Alkaline Earth Metals
Halogens
29
What is the Atomic Number?
The number of electrons In an atom.
The number of protons in an atom.
The average of mass numbers for all element isotopes
The sum of protons and neutrons in a nucleus.
30
What is true about a column on the Periodic Table?
They are called Groups.
Atomic number increases as you move down the column.
All the elements share similar properties.
All of the above

Atoms and Periodic Table Flashcards | StudBud