---
title: reactivity — school dictionary · trees and pragmatics
description: «reactivity» in the school dictionary: How easily and how strongly a substance takes part in chemical reactions: «Potassium has high reactivity.». Every meaning for a pupil with its dependency tree and pragmatics.
---

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# reactivity

<!-- .vintro -->
**Who acts:** substance, Potassium, person, Gold, We, high reactivity · **What happens:** take, have, react, be, stay, test · **To what, where:** part, chemical reactions, high reactivity, top, low reactivity, reactivity

<!-- .vabout -->
«reactivity» in the school dictionary: its 2 meanings for a pupil and its 6 examples, every sentence parsed by Mova itself — its syntax tree, a dependency tree in the style of Universal Dependencies, and its pragmatics clause by clause. The word in the dictionary, with its sense in the lessons: [reactivity in the school dictionary](https://md.mova.elamur.ai/free/en/dictionaries/school/w/reactivity.md).

## Meaning 1 {#m1}

<!-- .note -->
Usage: science, chemistry — kept apart, not parsed.

<!-- .ven lang=en -->
How easily and how strongly a substance takes part in chemical reactions: «Potassium has high reactivity.».

<!-- fold The tree, 16 words -->
```conllu
# sent_id = dict:school:reactivity:m1:1
# text = How easily and how strongly a substance takes part in chemical reactions: «Potassium has high reactivity.».
1	How	how	ADV	WRB	PronType=Int	2	advmod	_	_
2	easily	easily	ADV	RB	_	8	advmod	_	_
3	and	and	CCONJ	CC	_	8	cc	_	_
4	how	how	ADV	WRB	PronType=Int	5	advmod	_	_
5	strongly	strongly	ADV	RB	_	8	advmod	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	substance	substance	NOUN	NN	Number=Sing	8	nsubj	_	_
8	takes	take	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	part	part	NOUN	NN	Number=Sing	8	obj	_	_
10	in	in	ADP	IN	_	12	case	_	_
11	chemical	chemical	ADJ	JJ	Degree=Pos	12	amod	_	_
12	reactions	reaction	NOUN	NNS	Number=Plur	8	obl	_	SpaceAfter=No
13	:	:	PUNCT	:	_	16	punct	_	_
14	«	«	PUNCT	``	_	16	punct	_	SpaceAfter=No
15	Potassium	potassium	NOUN	NN	Number=Sing	16	nsubj	_	_
16	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	conj	_	_
17	high	high	ADJ	JJ	Degree=Pos	18	amod	_	_
18	reactivity	reactivity	NOUN	NN	Number=Sing	16	obj	_	SpaceAfter=No
19	.	.	PUNCT	.	_	8	punct	_	SpaceAfter=No
20	»	»	PUNCT	''	_	8	punct	_	SpaceAfter=No
21	.	.	PUNCT	.	_	8	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **take** | present | a substance | part |  | chemical reactions |  | easily, strongly *property* | vn fit-54.3 «NP V NP PP.location»: agent=Agent part=Value in reaction=Location |
| 2 | **have** *in a quote* | present | Potassium | high reactivity |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent reactivity=Patient |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## Meaning 2 {#m2}

<!-- .note -->
Usage: science, psychology — kept apart, not parsed.

<!-- .ven lang=en -->
How strongly a person or body reacts to something, such as stress or an allergy trigger.

<!-- fold The tree, 16 words -->
```conllu
# sent_id = dict:school:reactivity:m2:1
# text = How strongly a person or body reacts to something, such as stress or an allergy trigger.
1	How	how	ADV	WRB	PronType=Int	2	advmod	_	_
2	strongly	strongly	ADV	RB	_	7	advmod	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	person	person	NOUN	NN	Number=Sing	7	nsubj	_	_
5	or	or	CCONJ	CC	_	6	cc	_	_
6	body	body	NOUN	NN	Number=Sing	4	conj	_	_
7	reacts	react	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	to	to	ADP	IN	_	9	case	_	_
9	something	something	PRON	NN	Number=Sing|PronType=Ind	7	obl	_	SpaceAfter=No
10	,	,	PUNCT	,	_	13	punct	_	_
11	such	such	ADJ	JJ	Degree=Pos|ExtPos=ADP	13	case	_	_
12	as	as	ADP	IN	_	11	fixed	_	_
13	stress	stress	NOUN	NN	Number=Sing	9	nmod	_	_
14	or	or	CCONJ	CC	_	17	cc	_	_
15	an	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
16	allergy	allergy	NOUN	NN	Number=Sing	17	compound	_	_
17	trigger	trigger	NOUN	NN	Number=Sing	13	conj	_	SpaceAfter=No
18	.	.	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **react** | present | a person or body |  |  |  |  | to something; strongly *property* | vn respond-113 «NP V PP.theme»: agent=Agent to something=Theme |

## Example 1 {#x1}

<!-- .ven lang=en -->
Potassium is at the top of the reactivity series.

```conllu
# sent_id = dict:school:reactivity:x1:1
# text = Potassium is at the top of the reactivity series.
1	Potassium	potassium	NOUN	NN	Number=Sing	5	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	at	at	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	top	top	NOUN	NN	Number=Sing	0	root	_	_
6	of	of	ADP	IN	_	9	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
8	reactivity	reactivity	NOUN	NN	Number=Sing	9	compound	_	_
9	series	series	NOUN	NN	Number=Sing	5	nmod	_	SpaceAfter=No
10	.	.	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Potassium |  |  | the top |  | of the reactivity series | tree rules |

## Example 2 {#x2}

<!-- .ven lang=en -->
Gold has very low reactivity, so it stays shiny for centuries.

```conllu
# sent_id = dict:school:reactivity:x2:1
# text = Gold has very low reactivity, so it stays shiny for centuries.
1	Gold	gold	NOUN	NN	Number=Sing	2	nsubj	_	_
2	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	very	very	ADV	RB	_	4	advmod	_	_
4	low	low	ADJ	JJ	Degree=Pos	5	amod	_	_
5	reactivity	reactivity	NOUN	NN	Number=Sing	2	obj	_	SpaceAfter=No
6	,	,	PUNCT	,	_	9	punct	_	_
7	so	so	ADV	RB	_	9	advmod	_	_
8	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	nsubj	_	_
9	stays	stay	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
10	shiny	shiny	ADJ	JJ	Degree=Pos	9	xcomp	_	_
11	for	for	ADP	IN	_	12	case	_	_
12	centuries	century	NOUN	NNS	Number=Plur	9	obl	_	SpaceAfter=No
13	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Gold | low reactivity |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent reactivity=Patient |
| 2 | **stay** | present | Gold |  |  |  | century | shiny *property* | vn exist-47.1 «NP V»: agent=Theme |

## Example 3 {#x3}

<!-- .ven lang=en -->
We tested the reactivity of metals in acid.

```conllu
# sent_id = dict:school:reactivity:x3:1
# text = We tested the reactivity of metals in acid.
1	We	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	2	nsubj	_	_
2	tested	test	VERB	VBD	Mood=Ind|Number=Plur|Person=1|Tense=Past|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	reactivity	reactivity	NOUN	NN	Number=Sing	2	obj	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	metals	metal	NOUN	NNS	Number=Plur	4	nmod	_	_
7	in	in	ADP	IN	_	8	case	_	_
8	acid	acid	NOUN	NN	Number=Sing	6	nmod	_	SpaceAfter=No
9	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **test** | past | We | the reactivity of metals in acid |  |  |  |  | vn assessment-34.1 «NP V NP»: agent=Agent reactivity=Theme |

## Example 4 {#x4}

<!-- .ven lang=en -->
Sodium's high reactivity makes it fizz and dart about on water.

```conllu
# sent_id = dict:school:reactivity:x4:1
# text = Sodium's high reactivity makes it fizz and dart about on water.
1	Sodium	sodium	NOUN	NN	Number=Sing	4	nmod:poss	_	SpaceAfter=No
2	's	's	PART	POS	_	1	case	_	_
3	high	high	ADJ	JJ	Degree=Pos	4	amod	_	_
4	reactivity	reactivity	NOUN	NN	Number=Sing	5	nsubj	_	_
5	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	5	obj	_	_
7	fizz	fizz	VERB	VB	VerbForm=Inf	5	xcomp	_	_
8	and	and	CCONJ	CC	_	9	cc	_	_
9	dart	dart	VERB	VB	VerbForm=Inf	7	conj	_	_
10	about	about	ADV	RB	_	9	advmod	_	_
11	on	on	ADP	IN	_	12	case	_	_
12	water	water	NOUN	NN	Number=Sing	9	obl	_	SpaceAfter=No
13	.	.	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Sodium's high reactivity | Sodium |  |  |  |  | tree rules |
| 2 | **fizz** | infinitive | Sodium *not said here* |  |  |  |  |  | vn entity\_specific\_modes\_being-47.2 «NP V»: agent=Theme |
| 3 | **dart about** | infinitive | Sodium *not said here* |  |  | water |  | about *property* | vn run-51.3.2-2 «NP V PP.location»: agent=Theme on water=Trajectory |

## Example 5 {#x5}

<!-- .ven lang=en -->
Iron's reactivity with water and air makes it rust.

```conllu
# sent_id = dict:school:reactivity:x5:1
# text = Iron's reactivity with water and air makes it rust.
1	Iron	iron	NOUN	NN	Number=Sing	3	nmod:poss	_	SpaceAfter=No
2	's	's	PART	POS	_	1	case	_	_
3	reactivity	reactivity	NOUN	NN	Number=Sing	8	nsubj	_	_
4	with	with	ADP	IN	_	5	case	_	_
5	water	water	NOUN	NN	Number=Sing	3	nmod	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	air	air	NOUN	NN	Number=Sing	5	conj	_	_
8	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	8	obj	_	_
10	rust	rust	VERB	VB	VerbForm=Inf	8	xcomp	_	SpaceAfter=No
11	.	.	PUNCT	.	_	8	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Iron's reactivity with water and air | air |  |  |  |  | tree rules |
| 2 | **rust** | infinitive | air *not said here* |  |  |  |  |  | vn entity\_specific\_cos-45.5 «NP.patient V»: agent=Patient |

## Example 6 {#x6}

<!-- .ven lang=en -->
Some children have high reactivity to pollen.

```conllu
# sent_id = dict:school:reactivity:x6:1
# text = Some children have high reactivity to pollen.
1	Some	some	DET	DT	PronType=Ind	2	det	_	_
2	children	child	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	high	high	ADJ	JJ	Degree=Pos	5	amod	_	_
5	reactivity	reactivity	NOUN	NN	Number=Sing	3	obj	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	pollen	pollen	NOUN	NN	Number=Sing	5	acl	_	SpaceAfter=No
8	.	.	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | some children | high reactivity |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent reactivity=Patient |

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**Text:** the school dictionary of Mova's schools (`world/data/dictionary-schools/`), written for Mova. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each meaning and example read on its own. Elamur Cosmic License.

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